英语翻译

题目

英语翻译
But the exactly causes so many people to fall,and thus how best to prevent such spills,has evaded the medical establishmen
后半句的意思貌似是“长久以来都是医疗设备所避免的问题”翻译过来 我连中文都看不懂.

答案

A simple fall is one of the most dangerous traumas the elderly face:one-quarter of older Americans who suffer a hip fracture after a fall die within six months of the injury.But what exactly causes so many people to fall,and thus how best to prevent such spills,has long evaded the medical establishment.
但是究竟是什么原因导致如此多的人们跌倒,怎样最好去预防这样的跌倒,长久以来都是医疗机构所避免的问题