Start school later, sleep longer, learn better: New study shows that flexible school start times can be an effective and practical approach to reducing chronic sleep deprivation and improving adolescents’ mental health and academic performance.

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2026-02-27 00:00:00:03014250610http://paper.people.com.cn/rmrb/pc/content/202602/27/content_30142506.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/27/content_30142506.html11921 朝鲜举行劳动党九大纪念阅兵式

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