What does the author imply in the last paragraph?

A

Sleeplessness does harm to people’s health.

B

Few people really know the importance of sleep.

C

It is important to study our sleep patterns.

D

Average people probably sleep less than the rich.

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　　正确答案

本题考查判断推理。

题干问的是作者在最后一段所表达的观点，定位到最后一句If the most health conscious among us have such deep swings in our shuteye levels throughout the year, how much sleep are the rest of us losing? 作者提到了health-conscious，人们对健康的意识是缺乏的，对健康是视而不见的，综上，B选项正确。

故正确答案为B项。

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　　解析同上