Which of the following is NOT true according to the text？
A. Body doesn"t work as much in the sleep as in the day time.
B. Seven or eight hours of sleep is comparably good to people"s health.
C. Enough evidence has shown that excessive sleep leads to health problems as well.
D. The study chose people working in government sectors as subjects.
活动开始就应给儿童提供强度大的学习内容，以便使儿童尽快进入活动状态。()
Which of the following is the best title for the text？
A. Everyone desires a good night"s sleep
B. A study on less sleep"s jeopardy
C. More sleep doesn"t mean better life
D. Less sleep, more heart disease
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