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中??(zhong)小??(xiao)學(xué)?(xue)生??(sheng)8—10小??(xiao)時??(shi) 首??(shou)先??(xian)從??(cong)時??(shi)間?(jian)長?(chang)度??(du)上??(shang)來??(lai)說??(shuo)??，不??(bu)同??(tong)年??(nian)齡?(ling)段??(duan)人?(ren)群??(qun)每??(mei)天??(tian)對??(dui)睡??(shui)眠??(mian)時??(shi)長??(chang)的??(de)需??(xu)求??(qiu)不??(bu)同?(tong)：LZWDBTOXSXqibao666888 zhong ??(zhong)xiao ??(xiao)xue ?(xue)sheng ??(sheng)8—10xiao ??(xiao)shi ??(shi) shou ??(shou)xian ??(xian)cong ??(cong)shi ??(shi)jian ?(jian)chang ?(chang)du ??(du)shang ??(shang)lai ??(lai)shuo ??(shuo)??，bu ??(bu)tong ??(tong)nian ??(nian)ling ?(ling)duan ??(duan)ren ?(ren)qun ??(qun)mei ??(mei)tian ??(tian)dui ??(dui)shui ??(shui)mian ??(mian)shi ??(shi)chang ??(chang)de ??(de)xu ??(xu)qiu ??(qiu)bu ??(bu)tong ?(tong)：