- 问题详情:NowadaystheU.S.studentsaresleepyinschoolbecausetheyspendtoomuchtimetexting,playingvideogames,watchingTV,andusingthemediainotherways.“Heavymediauseinterfereswithsleepbyreducingsleepduration,makingithardertofallasleep,andloweringsleepquality,...
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