D

    It happens every night—bedtime. But what if you're not sleepy? Should you still go to bed if you are just going to lie there with your eyes wide open? It's a problem that has been around as long as there are people trying to sleep.

    You might be excited by something you did in the day. You might be nervous about what you're going to do the next day. Maybe you don't like sleeping alone in your room. Maybe you have frightening dreams. All of these are possible reasons for your sleeping problem. However, there are some steps you can take to help you solve it.

    One thing that can help is talking to a parent or another trusted adult about what you're worrying about at bedtime. For example, if you're nervous about taking a test, or upset about being teased (被嘲弄) at school, it can really help to tell somebody. Knowing that somebody has heard you can help ease your mind so that you can have a good rest.

    Sleeping in a comfortable bed in a quiet and cool room is a good choice. If there's anything in your room that makes you feel uneasy or anxious at night, like a picture that looks strange in the dark, or a noisy faucet (水龙头) in the bathroom, be sure to ask your parents to move or fix it. Make sure electronics, such as mobile phones or iPads, are kept away from your bed. They can keep you excited, making it harder for you to fall asleep.

    If you are usually restless around bedtime, doing certain things to relax beforehand may help you fall asleep. Try to take more time to wind down by taking a warm bath, or listening to a bedtime story at least 30 minutes before you go to sleep. It also helps to follow a bedtime routine and go to sleep at the same time every night. As a result, your body will get the message that it's almost time to sleep. Your body will know to start feeling tired.

    In order to find the right solution for you, it's possible that you understand what exactly is keeping you up at night. Getting a good night's sleep is worth the time and effort of finding the right solution to your sleeping problem.

如图是某物理小组设计的拍摄机动车辆闯红灯设备的原理示意图．红灯亮时，光控开关接收到红光会闭合；机动车驶过时，安装在路面下方的压力开关受到机动车的压力会闭合．当摄像系统的电路自动拍摄违章车辆时，关于开关的状态下列说法中正确的是（　　）

给我的孩子们（节选）

丰子恺

      ①我的孩子们!我憧憬于你们的生活，每天不止一次!可惜到你们懂得我的话的意思的时候，你们将不复是可以使我憧憬的人了!

      ②瞻瞻!你尤其可佩服。你是身心全部公开的真人。你什么事体都像拼命地用全副精力去对付。小小的失意，像花生米翻落地了，自己嚼了舌头了，小猫不肯吃糕了，你都要哭得嘴唇翻白，昏去一两分钟。外婆去普陀烧香买回来给你的泥人，你何等鞠躬尽瘁地抱他，喂他；有一天你自己失手把他打破了，你的号哭的悲哀，比大人们的破产、失恋、心碎、丧考妣、全军覆没的悲哀都要真切。两把芭蕉扇做的脚踏车，麻雀牌①堆成的火车、汽车，你何等认真地看待，挺直了嗓子叫“汪——”“咕咕咕……”，来代替汽笛。宝姐姐讲故事给你听，说到“月亮姐姐挂下一只篮来，宝姐姐坐在篮里吊了上去，瞻瞻在下面看”的时候，你何等激昂地同她争，说“瞻瞻要上去，宝姐姐在下面看”!甚至哭到漫姑面前去求审判。

      ③你要我抱你到车站里去，多多益善地要买香蕉，满满地擒了两手回来，回到门口时你已经熟睡在我的肩上，手里的香蕉不知落在哪里去了。这是何等可佩服的真率、自然与热情!大人间的所谓“沉默”“含蓄”“深刻”的美德，比起你来，全是不自然的、病的、伪的!

      ④你们的创作力，比大人真是强盛得多哩：瞻瞻!你的身体不及椅子的一半，却常常要搬动它，与它一同翻倒在地上；你又要把一杯茶横转来藏在抽斗里。要皮球停在壁上，要拉住火车的尾巴，要月亮出来，要天停止下雨。在这等小小的事件中，明明表示着你们的弱小的体力与智力不足以应付强盛的创作欲、表现欲的驱使，因而遭逢失败。然而你们是不受大自然的支配，不受人类社会的束缚的创造者，所以你的遭逢失败，例如火车尾巴拉不住，月亮呼不出来的时候，你们决不承认是事实的不可能，总以为是爹爹妈妈不肯帮你们办到。同不许你们弄自鸣钟同例，所以愤愤地哭了，你们的世界何等广大!

      ⑤阿宝!有一晚你拿软软的新鞋子，和自己脚上脱下来的鞋子，给凳子的脚穿了，划④袜立在地上，得意地叫“阿宝两只脚，凳子四只脚”的时候，你母亲喊着“龌龊了袜子!”立刻擒你到藤榻上，动手毁坏你的创作。当你蹲在榻上注视你母亲动手毁坏的时候，你的小心里一定感到“母亲这种人，何等煞风景而野蛮”吧!

      ⑥瞻瞻!有一天开明书店送了几册新出版的毛边的《音乐入门》来。我用小刀把书页一张一张地裁开来，你侧着头，站在桌边默默地看。后来我从学校回来，你已经在我的书架上拿了一本连史纸印④的中国装的《楚辞》，把它裁破了十几页，得意地对我说：“爸爸!瞻瞻也会裁了!”瞻瞻!这在你原是何等成功的欢喜，何等得意的作品!却被我一个惊骇的“哼!”字喊得你哭了。那时候你也一定抱怨“爸爸何等不明”吧!

      ⑦孩子们！你们果真抱怨我，我倒喜欢；到你们的抱怨变为感谢的时候，我的悲哀来了！

      ⑧我在世间，永没有逢到像你们这样出肺肝相示的人。世间的人群结合，永没有像你们样的彻底地真实而纯洁。

      ⑨但是，你们的黄金时代有限，现实终于要暴露的。这是我经验过来的情形，也是大人们谁也经验过的情形。我眼看见儿时的伴侣中的英雄、好汉，一个个退缩、顺从、妥协、屈服起来，到像绵羊的地步，我自己也是如此。“后之视今，亦犹今之视昔。”你们不久也要走这条路呢!

      ⑩这是何等可悲哀的事啊!

注：①麻雀牌：麻将  ②划chan袜：脱掉鞋只穿袜  ③连史纸：江西出产的一种纸。