Public concern over "optimal daily sleep duration" often causes unnecessary anxiety. However, there is no one-size-fits-all answer. Sleep needs vary by age and individual. Instead of focusing solely on hours, pay attention to whether you wake up feeling refreshed.

公众对“最佳每日睡眠时长”的关注常引发不必要的焦虑。然而，睡眠需求因年龄和个体差异而异，并无放之四海皆准的答案。与其执着于睡眠时长，不如关注醒来时是否神清气爽。

1、concern / kənˈsɜːn/ n. 关心；担忧；关注（专升本词汇）

例句：Public concern about environmental pollution has been growing in recent years.

近年来，公众对环境污染的关注日益增加。——《牛津高阶英汉双解词典》（第 10 版）

2、individual / ˌɪndɪˈvɪdʒuəl/ adj./n. n. 个人；个体；adj. 个人的；个体的；独特的（专升本词汇）

例句：Each individual has his or her own unique talents.

每个人都有自己独特的才能。——《柯林斯高阶英汉双解词典》（第 8 版）

3、solely / ˈsəʊlli/ adv. 仅仅；只；唯一地

例句：The success of the project depends solely on our hard work.

项目的成功完全取决于我们的努力工作。——《牛津高阶英汉双解词典》（第 10 版）

A review of hundreds of studies by an expert panel convened by the American Academy of Sleep Medicine (AASM) shows a clear pattern: infants and young children need the most sleep, and the recommended duration gradually decreases with age, stabilizing after 18 (though it is not fixed).

美国睡眠医学学会（AASM）召集的专家小组对数百项研究进行的综述显示出一个清晰规律：婴幼儿需要最多的睡眠，推荐睡眠时长随年龄增长逐渐减少，并在18岁后趋于稳定（不过并非固定不变）。

4、panel / ˈpænl/ n. 专家小组；面板；镶板（专升本词汇）

例句：A panel of experts will discuss the future of renewable energy.

专家小组将探讨可再生能源的未来。——《牛津高阶英汉双解词典》（第 10 版）

5、recommend / ˌrekəˈmend v. 推荐；建议；劝告（专升本词汇）

例句：The doctor recommended that I should exercise at least three times a week.

医生建议我每周至少锻炼三次。——《柯林斯高阶英汉双解词典》（第 8 版）

6、stabilize /ˈsteɪbəlaɪz/ v. （使）稳定；（使）稳固

例句：The government took measures to stabilize the prices of daily necessities.

政府采取措施稳定了生活必需品的价格。——《朗文当代高级英语辞典》（第 6 版）

Sleep forms a spectrum, including short sleepers, the common 7–9 hour range, and long sleepers. The idea that "adults need 8 hours" is a general guideline, not a strict rule. Avoid labeling yourself as sleep-deprived or oversleeping based solely on a number.

睡眠存在一个连续谱，涵盖短睡者、常见的7-9小时睡眠者以及长睡者。“成年人需要8小时睡眠”的观点仅为一般性建议，而非硬性规定。切勿仅凭数字就给自己贴上“睡眠不足”或“睡眠过多”的标签。

7、spectrum /ˈspektrəm/ n. 范围；谱；频谱

例句：This new policy covers a wide spectrum of social issues.

这项新政策涵盖了广泛的社会问题。——《牛津高阶英汉双解词典》（第 10 版）

8、guideline /ˈɡaɪdlaɪn/ n. 指导方针；准则；参考原则 （专升本词汇）

例句：The company has issued new guidelines for employee behavior.

该公司已发布新的员工行为准则。——《柯林斯高阶英汉双解词典》（第 8 版）

To determine your sleep needs, observe your daytime alertness. If you feel focused and energetic, you're likely getting enough sleep. If you often feel drowsy or struggle to concentrate, your sleep may be insufficient or of poor quality. Most adults need around 7 hours of sleep, but the key measure is how you feel during the day. Occasional poor sleep is normal — the focus should be on long-term habits.

要判断你的睡眠需求，请观察白天的精神状态。若你感觉专注且精力充沛，说明睡眠可能充足；若常感昏昏欲睡或难以集中注意力，则睡眠可能不足或质量欠佳。大多数成年人需要大约7小时的睡眠，但关键指标在于白天你的精神状态。偶尔睡眠质量差是正常的——重点应放在长期睡眠习惯上。

9、insufficient / ˌɪnsəˈfɪʃnt/ adj. 不足的；不够的（专升本词汇）

例句：The evidence provided is insufficient to support his claim.

所提供的证据不足以支持他的主张。——《朗文当代高级英语辞典》（第 6 版）

10、occassional / əˈkeɪʒənl / adj. 偶尔的；偶然的；间或发生的（专升本词汇）

例句：She makes occasional trips to London to visit her sister.

她偶尔去伦敦看望姐姐。——《牛津高阶英汉双解词典》（第 10 版）