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Most adults do not need a hard eight hours of sleep; a growing body of evidence and evolutionary research suggest the optimal nightly sleep for many healthy adults is closer to seven hours, with health risks rising on either side of that range in a U‑shaped pattern.，更多细节参见PDF资料
20:19, 3 марта 2026Экономика，更多细节参见PDF资料
Бритни Спирс арестовали20:54
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