题目

Drinking more than two alcoholic drinks daily in middle-age may raise your stroke(中风) risk more than traditional factors such as high blood pressure and diabetes（糖尿病）, according to new research in the American Heart Association journal Stroke.    In a study of 11,644 middle-aged Swedish twins who were followed for 43 years, researchers compared the effects of an average of more than two drinks daily (heavy drinking) to less than half a drink daily (light drinking). The study showed that: ·Heavy drinkers had about a 34 percent higher risk of stroke compared to light dri近视眼的根本原因是（ ）A．晶状体过度变凸不能恢复原状B．角膜过度变凸不能恢复原状C．玻璃体变凸不能恢复原状D．视网膜变凸不能恢复原状