一个十四岁的“熊孩子”在两个月内，通辻支付平台偷偷把父母缝了十年牛仔裤赚来的16万多元存款统统打赏给了直播平台女主播。一个月后，父母才发现情况。起初这孩子是迷上了手游，不顾学校反对，偷着带手机到学校。“感觉在游戏里面能找到一种刺激感，可以做自己的英雄。”今年暑假，他又对触手了TV着迷了，他说打赏之后，女主播会说“谢谢”、“么么岐”等之类的话，让自己有种存在感。

这则材料引发了你怎样的思考？如何避免再出现其他这样的“熊孩子”？你有什么好的建议？请写一篇不少于800字的作文。

要求：选好角度，确定立意，明确文体，自拟标题；不要套作，不得抄袭。

Different countries have different customs. When you travel to another countries，please follow their customs，just as the saying goes，“             .”Very often people who travel to the United States forget to tip（付小费）.It is usual to tip porters who help carry your bags，taxi drivers and waiters. Waiters expect to get a 15% tip on the cost of your meal. Taxi drivers expect about the same amount.
In England，make sure to stand in line even if there are only two of you. It's important to respect lines there. It’s a good idea to talk about the weather. It's a favorite subject of conversation with the British.
   In Spain，it's a good idea to have a light meal in the afternoon if someone invites you for dinner. People have dinner very late，and restaurants do not generally open until after 9 pm.
   In Arab countries，men kiss one another on the cheek（脸颊）. Your host may welcome you with a kiss on both cheeks. It is polite for you to do the same.
   In Japan，people usually give personal or business cards to each other when they meet for the first time. When a person gives you a card，don't put it into your pocket right away. The person expects you to read it.Don't forget to be careful of your body language to express something In conversation. A kind of body language that is acceptable in one culture may be impolite in another.

计算：

（1）﹣1²﹣（1﹣0.5）×$\frac{1}{3}$×$\sqrt{36}$

（2）（8a²b﹣5ab²）﹣2（3a²b﹣4ab²）

（3）9（3﹣x）²=25               

（4）$\left\{\begin{array}{c}2x-y=5\\ 3x+4y=2\end{array}\right.$．