Question

Experts recently suggested that teens should start adopting early bedtimes. Before you dismiss it as a habit suited only for young kids, consider that there are serious advantages in being well-rested. And now, even more research suggests that putting phones away before going to sleep is important to teens’ well-being.

A new study from Seton Hall University School of Health and Medicine Science found that 62 percent of kids used their smart phones before bed, and it’s causing less sleep and poor performance in school.

Those teens who text(发短信) before bedtime tend to go to sleep later, and get up later in the morning. Such behavior can be associated with mental health issues like depression or anxiety. Besides, once teens do receive a text, experts found, they tend to respond right away. Then the text conversation continues — resulting in an even later bedtime.

The study’s co-author Dr. Peter Polos says this leads to excessive stimulation(过度刺激) at night. Light from electronic devices can block the secretion(分泌) of melatonin — a hormone(荷尔蒙) that promotes sleep, which makes sleep difficult in the face of overuse of smart phones at night. It’s true! More screen time means less sleep time; other studies have suggested the same idea.

As for a final piece of advice, Dr. Sushanth Bhat says, since getting the proper amount of sleep is very important for brain development and learning in the teenage years, our study should encourage parents and guardians (监护人) to limit adolescent smart phone usage at night. Keep in mind that teens aren’t the only ones addicted to their phones! Adults can also benefit from setting a tech curfew(宵禁) for themselves. After all, kids learn by example!

1.What is the text mainly about?

A. How to promote sleep.

B. How kids learn from their parents.

C. The advantages of going to bed early.

D. The disadvantages of phone usage before bed.

2.Who are likely to go to sleep later according to the text?

A. Kids having text conversations before bed.

B. Kids putting their phones away at night.

C. Kids studying their lessons hard at school.

D. Kids exercising with friends after school.

3.Melatonin can ________.

A. make sleep difficult                 B. lead to later bedtimes

C. help people fall asleep               D. wake people from a sleep

4.The author advises parents to ________.

A. learn from their kids

B. get rid of smart phones

C. set a good example to their kids

D. try to benefit from hi-tech development

Answer

1.D

2.A

3.C

4.C

【解析】

试题分析：本文是说明文。主要讲述了研究表明青少年睡前玩手机害处多多，并建议家长在这方面给孩子们树立良好的榜样。

1. 主旨大意题。本文主要讲了睡前玩手机影响睡眠和精神状态，并提出解决这个问题的建议。故选D项。

2. 细节理解题。由第三段开头的Those teens who text before bedtime tend to go to sleep later可知。

3. 细节理解题。由第四段中的melatonin, a hormone that promotes sleep可知，melatonin是促进睡眠的荷尔蒙。故选C。

4. 推理判断题。由文章末的Adults can also benefit from setting a tech curfew forthemselves. After all, kids learn by example可推断，作者建议家长们在合理使用手机方面给孩子们树立好的榜样。

【名师点拨】

推理判断题要求在理解原文表面文字信息的基础上，做出一定的推理判断，从而得到文章的隐含意义和深层意义。推理判断题所涉及的内容可能是文中的某一句话，也可能是某几句话，所以，推理题的答案只能是根据原文表面文字信息一步推出的答案：即对原文某一句话或某几句话所作的同义改写或综合。推理判断题的题干中通常含infer,suggest,imply,conclude indicate等标志性词语。 这种题型主要包括细节判断题、态度观点推断题、写作意图推断题、文章出处判断题和猜测想象推断题。比如，第35小题C推理判断题。由文章末的Adults can also benefit from setting a tech curfew forthemselves. After all, kids learn by example可推断，作者建议家长们在合理使用手机方面给孩子们树立好的榜样。

考点：考查健康类阅读