Even a small reduction in salt in the diet can be a big help to the heart. A new
题型：不详难度：来源：
hree grams less a day would af
fect heart disease in the United States.The result: thirteen percent fewer heart attacks. Eight percent fewer strokes. Four percent fewer deaths. Eleven percent fewer new cases of heart disease. And two hundred forty billion dollars in health care savings.
Researchers found it could prevent one hundred thousand heart attacks and ninety-two thousand deaths every year.
The study is in the New England Journal of Medicine. Kirsten, at the University of California, was the lead author. She says people would not even notice a difference in taste with three grams, or one-half teaspoon, less salt per day. The team also included researchers at Stanford and Columbia University.
Each gram of salt contains four hundred milligrams of sodium, which is how foods may list their salt content.
The government says the average American man eats ten grams of salt a day. The American Heart Association advises no more than three grams for healthy people. It says salt in the American diet has increased fifty percent since the nineteen seventies, while blood pressures have also risen. Less salt can mean a lower blood pressure.
New York City Mayor Michael Bloomberg is leading an effort called the National Salt Reduction Initiative. The idea is to put pressure on food companies and restaurants.
Mayor Bloomberg has already succeeded in other areas, like requiring fast food places in the city to list calorie information. Now a study by the Seattle Children"s Research Institute shows how that idea can influence what parents order for their children.
Ninety-nine parents of three to six year olds took part. Half had McDonald"s menus clearly showing how many calories were in each food. The other half got menus without the calorie information.
小题1: How many heart attacks will occur in the US every year？
| A．nearly 800,000. | B．24,000. |
| C．100,000. | D．92,000. |
| A．Americans ate no more than 5 grams of salt per day in the 1970s |
| B．the American Heart Association suggest less than 3 grams of salt every day |
| C．a reduction in salt in the diet helps lower blood pressure |
| D．all the heart diseases result from eating more salt |
| A．advise Americans to eat less salt |
| B．put pressure on food companies and restaurants |
| C．require fast food places to list calorie information |
| D．attract the public attention to the problem |
| A．strokes | B．heart attacks |
| C．blood pressures | D．stomach diseases |
| A．Less salt can mean more life |
| B．Prevent heart attacks and deaths |
| C．The National Salt Reduction Initiative |
| D．Americans should eat less salt |
答案
小题1:A
小题1:C
小题1:B
小题1:D
小题1:A
解析
举一反三
The five leading causes are bleeding, infection, high blood pressure, longtime labor and bad abortions (流产). Mothers" deaths from such causes were largely reduced nearly a century ago in developed countries.
Experts say that what kill many women are “the three delays”— the woman"s delay in deciding to go to the hospital, the time she loses traveling there and the hospital"s delay in starting treatment. Only about 15 percent of births have dangerous complications(并发症)．
Women lack education and information about birth control. Husbands and inlaws, may decide where a woman gives birth and insist that she stay at home to save money. However, there is no single solution to a problem with so many factors—shortages of doctors, nurses, drugs, equipment, roads and t
ransportation—though hospital officials are trying many things now.One stopgap measure to solve the problem for the present has been to train assistant medical officers, to perform certain operations. Some African countries
are now struggling to train more assistants and midwives (接生婆) , and provide places for pregnant women to stay near hospitals.But there is a long way to go. Only 20 percent of women in the continent give birth at the hospital. More than 50 percent stay at home to give birth, and the rest go to local clinics that cannot handle emergencies.
小题1:Which is not included in the five leading causes of women"s deaths during pregnancy and childbirth?
| A．Infection. | B．High blood pressure. |
| C．Traveling long distances. | D．Bleeding. |
| A．final | B．temporary | C．effective | D．instant |
| A．The governments of African countries have to take more effective measures to save pregnant women. |
| B．Developed countries should help African countries reduce mothers"deaths. |
| C．The husbands in poor countries should take responsibility for their wives"deaths. |
| D．Most problems that cause women"s deaths during pregnancy and childbirth can be treated or prevented. |
| A．Positive. | B．Negative. | C．Objective. | D．Subjective. |
The change will not affect the taste or the number of calories in the food. But by changing the cooking oil, McDonald’s says, it hopes to cut by nearly half the amount of trans fatty acids (转换脂肪酸) in French fries and reduce the amount of saturated fats(饱和脂肪) by 16 percent. Scientists believe that trans fatty acids and saturated fats raise cholesterol(胆固醇) levels and increase the risk of heart disease.
McDonald’s new step is important because McDonald’s is an industry leader and other fast-food chains and food processors may follow the lead.
For McDonald’s ,the action comes at a time when Americans are becoming more and more concerned about; obesity (肥胖) and are increasing pressure on food companies to offer healthy and nutritious (有营养的) food to consumers.
After three years of study, McDonald’s officials say they are switching oil that is lower in saturated fats and trans fatty acids. McDonald’s says the change will not cause higher price for consumers.
Though there is some change, scientists say that the amount of trans fat in foods at McDonald’s and at other fast-food companies is still important.
小题1:More than 13,000 McDonald’s restaurants in America will use a new kind of cooking oil to ______________.
| A．lower the costs of the products |
| B．maker its food taste hatter than ever before |
| C．cure (治愈) the heart disease |
| D．do good to the health of consumers |
| A．turning on | B．turning off | C．changing | D．studying |
| A．McDonald’s is a pioneer in food products |
| B．McDonald’s is enlarging its restaurants in the world |
| C．fried foods can’t keep up with the development of modem society |
| D．McDonald’s is to use new cooking oil |
| A．the prices of McDonald’s foods will be a tot higher |
| B．consumers will find the taste of McDonald’s foods different |
| C．many other food companies will do what McDonald’s does |
| D．obesity will disappear in American society sooner or later |
Vitamin D is produced naturally by the skin in response to(对…的反应) sunlight and may help to slow the ageing process and protect against heart disease, according to the study.
Researchers from King’s College London studied 2,160 women aged between 18 and 79, looking at their telomeres--- a biological marker of ageing found in DNA. As people get older, their telomeres get shorter and they become more susceptible(易受伤害的) to certain illnesses.
But the study found women with high levels of vitamin D had comparatively longer telomeres--- a sign of being biologically younger and healthier.
The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.
Lead researcher Dr Brent Richards said, “These results are exciting because they show for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D.” This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer.”
Professor Tim Spector, a co-author of the report, added, “Although it might sound absurd
(荒唐的), it’s possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process.”
Vitamin D made by the action of sunlight on the skin accounts for 90 percent of the body’s supply, but lower levels can also be got through food such as fish, eggs and breakfast cereals(粥).
Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.
小题1: A certain amount of sunshine helps people stay young because _____.
| A．people feel happy and energetic in the sun |
| B．sunshine protects people against heart disease |
| C．vitamin D makes one’s skin look young and healthy |
| D．vitamin D may help to slow the ageing process |
| A．sunlight causes skin cancer to people with high level of vitamin D |
| B．the study generally has a healthy effect on the general ageing process |
| C．vitamin D can only be got from fish, eggs and breakfast cereals |
| D．the higher levels of vitamin D people have, the more slowly people may age |
A. Telomeres are important signs of ageing of the DNA.
B. Sunlight can be dangerous as it causes skin cancer.
C. Sunlight does a great deal of good to our health.
D. Vitamin D can also be gained from food.
小题4: What is the best title of the passage?
| A．Secret of Staying Young |
| B．Vitamin D Helps Slow Ageing |
| C．Sunlight and Vitamin D |
| D．Sunlight and Health |
Our ancestor
s enjoyed the healing power of nature , and now scientists are starting to catch up．According to research in recent years, just having a view of nature has been shown to improve hospital patients" recovery and reduce illness rates among office workers．Also, exposure （曝露）to wildlife, horseback riding, hiking, camping and farms can be helpful for a variety of health conditions in adults and children．Much of this type of research is focusing on children, and in fact an entire movement has quickly developed to connect kids with the healing power of nature．
Obesity （肥胖）．Rates of childhood obesity have grown sharply in recent years, and this is partly because of reduced outdoor activity time．Increasing the time students spend learning about nature, both in and outside the classroom, would help solve this problem．Such lessons are often more attractive for students and often lead them to become more active outside．
Attention deficit hyperactivity disorder （ADHD） （注意力缺失症）．Exposure to ordinary natural settings （环境） in the course of common after-school and weekend activities may be effective in reducing attention deficit symptoms in children．Participation in green activities —such as nature walks—helped ADHD patients from a wide range of backgrounds to stay focused and complete tasks．
Stress．Access to nature, even houseplants, can help children cope with stress．
Depression and seasonal emotional disorder．Major depression requires medical treatment, but physical activity, especially outdoors, can help ease symptoms．For your average case of winter blues, experts suggest spending time outside every day and, if possible, taking the family to a sunny vacation spot in mid-winter．
Experts emphasize that you needn" t go to wilderness preserves to enjoy nature" s benefits—simply walking in a city park or growing in a rooftop garden can make a difference．
小题1:It can be inferred from the first two paragraphs that____．
| A．ancient people were not familiar with the healing power of nature． |
| B．modern people are not familiar with the healing power of nature． |
| C．the healing power of nature works better on children． |
| D．the healing power of nature works better on office workers． |
| A．should engage parents in them |
| B．should take place outdoors |
| C．are used widely at schools |
| D．are liked by students |
| A．improve children" s skills at learning |
| B．help reduce ADHD symptoms |
| C．treat major depression |
| D．cure winter blues |
| A．You can only enjoy nature"s benefits in the wilderness． |
| B．A common natural setting is beneficial to your health． |
| C．A city park and a rooftop garden have different benefits． |
| D．Too many people in the wilderness will reduce the benefits of nature． |
In an experiment that exposed healthy volunteers to a cold or flu virus, researchers found that people with a generally sunny disposition were less likely to fall ill. The findings, published in the journal Psychosomatic Medicine, build on evidence that a “positive emotional style” can help protect us from the common cold and other illnesses.
Researchers believe the reasons may be both objective----as in happiness improving immune, function----and subjective----as in happy people being less troubled by a sore throat or funny nose. "People with a positive emotional style may have different immune responses to the virus," explained lead study author Dr Sheldon Cohen of Carnegie Mellon University in Pittsburgh. "And when they do get a cold, they may interpret their illness as being less severe."
Cohen and his colleagues had found in a previous study that happier people seemed less likely to catch a cold, but some questions remained as to whether the emotional trait itself had the effect.
For the new study, the researchers had 193 healthy adults complete standard measures of personality traits, self-perceived health and emotional "style." Those who tended to be happy, energetic and easy-going were judged as having a positive emotional style, while those who were often unhappy, tense and hostile had a negative style.
The researchers gave them nasal(鼻的) drops containing either a cold virus or a particular flu virus. Over the next six days, the volunteers reported on any aches, pains, sneezing or congestion they had, while the researchers collected objective data, like daily mucus production. Cohen and his colleagues found that based on objective measures of nasal woes, happy people were less likely to develop a cold.
小题1:Which is the best title for the passage?
| A．Stay Away From Being Negative |
| B．Positive or Negative, It’s Up To You |
| C．An Effective Medicine For Being Fit |
| D．Warm People Likely To Keep Cold Away |
| A．their cheerful mood benefits the immune system |
| B．they have developed a certain gene against flu virus |
| C．they are less likely to have s sore throat and funny nose |
| D．they have got a stronger self-confidence in their health |
| A．character | B．day | C．future | D．occupation |
| A．medical students | B．lead authors | C．the public | D．the volunteers |
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