(单选题)

The statements about these three studies below are correct except for ______.

A.even taking the supplements every day, the rate of death for 450,000 participants does not decline obviously

B.the effects of a daily multivitamin after a heart attack in about 1,700 men and women over an average of five years are pretty positive

C.daily supplement intake doesn’t show any help for preventing dementia

D.there is no definitive conclusion drawn by the second study since some participants stopped taking their medications

参考答案：B

参考解析：

细节理解题。根据文章“Enough is Enough”部分的三个研究可知A项“即使每天服用补充剂，45万参与者的死亡率也不会明显下降”；C项“每日补充摄入量对预防痴呆没有任何帮助”；D项“第二项研究没有得出明确的结论，因为一些参与者停止服药”都符合原文；根据该部分第二个研究的第二句“No advantage could be found”可知1700名男性和女性在平均五年的时间里心脏病发作后每天服用复合维生素没什么积极效果。故选B。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语