Computers can injure you. Most other injuries happen suddenly. For example,if you fall off a bike and break your arms,it happens very quickly. But computer injuries happen slowly. You probably know how to ride a bike safely. Now learn to use a computer safely.
Your eyes
Too much light can injure your eyes,so never sit too close to a computer screen. Your eyes should be at least 50cm from the screen. Remember to look away from it sometimes. This gives your eyes a rest.
When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on (反射) the screen. If the window is in front of you, the sun and the screen will both shine into your eyes.
Your hands and wrists
Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time,follow these three rules:1) Rest your wrists on some thing. 2) Keep your elbows (肘) at the same height as the keyboard. 3) Stop sometimes and exercise your hands,wrists and fingers in a different way.
Your back
Some people sit for many hours in front of a computer. If you sit in the wrong way,you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should be in front of your eyes. Your forearms,wrists,hands and the upper part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time,get up every 30 minutes and exercise your arms,legs and neck.
Enjoy your computer,but use it safely.
电脑会伤害你。大多数其他的伤害都是突然发生的。例如,如果你从自行车上摔下来,摔断了胳膊,这发生得很快。但是电脑伤害发生得很慢。
你可能知道如何安全地骑自行车。现在学会安全使用电脑。
你的眼睛
太多的光线会伤害你的眼睛,所以永远不要坐得离电脑屏幕太近。你的眼睛应该离屏幕至少50厘米。记得有时候不要看它。这会让你的眼睛得到休息。
当你使用电脑时,窗口应该在你的左边或右边。如果它在你身后,光线就会反射到屏幕上。如果窗户在你面前,阳光和屏幕都会照进你的眼睛。
你的手和手腕
手和手腕可能会受伤,因为手和手腕以同样的方式移动数百次。如果你长时间使用键盘,请遵循以下三条规则:1)把手腕放在某个东西上。2)保持肘部与键盘高度一致。3)有时停下来,用不同的方式锻炼你的手、手腕和手指。
你的背部
有些人在电脑前一坐就是几个小时。如果你坐的姿势不对,你可能会伤到你的背部或颈部。所以你应该坐直后背。屏幕的顶部应该在你的眼睛前面。你的前臂、手腕、手和腿的上半部分都应该与地面平行。如果你坐了很长时间,每30分钟就站起来锻炼一下胳膊、腿和脖子。
享受你的电脑,但要安全使用。
A computer screen may injure your eyes if your eyes are too close to it.
如果你的眼睛离电脑屏幕太近,它可能会伤害你的眼睛。