Most adults do not need a hard eight hours of sleep; a growing body of evidence and evolutionary research suggest the optimal nightly sleep for many healthy adults is closer to seven hours, with health risks rising on either side of that range in a U‑shaped pattern.
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本报北京2月26日电 （记者彭波）十四届全国人大常委会第六十三次委员长会议26日下午在北京人民大会堂举行。赵乐际委员长主持。
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