U.K. Biobank analyses also report U‑shaped relationships, with elevated risks for both short sleep (less than seven hours) and long sleep (often defined as more than nine hours for adults), after adjusting for health and lifestyle factors.
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Q：很多人对夸克AI眼镜的反馈是非常好的，无论是销量上还是用户留存率上，用户每天用多少小时，综合这些数据来看，你们满意吗？