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.

· · 来源：software资讯

15:26, 27 февраля 2026Россия

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13:46, 27 февраля 2026Силовые структурыЭксклюзив

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