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.

2026年2月15日 · 周杰 · 来源：tutorial资讯

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18:53, 27 февраля 2026Ценности。快连下载安装对此有专业解读

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Ginger acts like a personal coach that helps you practice certain exercises based on your mistakes.