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- 問題詳情： Americansarenotfamousforself-deprivation,butexpertssayweconsistentlyfailtogetagoodnight'ssleep.Therecommendeddailyrequirementsshouldsoundfamiliar:eighthoursofsleepanightforadultsandatleastanhourmoreforadolescents.Yet71%ofAmericanadults...
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