并请问为什么是studied well而不是studied hard,谢谢

题目

并请问为什么是studied well而不是studied hard,谢谢
Mr Green works in a hospital. He drives a car and he is very busy. His wife works in a school library. She is very strict with his son, Tommy. She hopes that he will become a scientist. Half a year ago, when Tommy was six, Mrs Green took him to her school .The boy was clever and studied well. But at first he couldn't adapt himself to the new life. In the morning he woke up late and in the evening he didn't go to bed on time. His mother, however, made him do everything on time. She hopes that he would cultivate good habits.请问这段话的翻译,

答案

study well是说学习成绩好,study hard是说学习刻苦
前面说the boy was clever,那么成绩当然就好拉