Сокращение " How to use a computer safely" How to use a computer safely
Computers can injure you. Most other injuries happpen suddenly. For example, if you fall off a bicycle and break your arm, it happens very quickly. But computer injuries happen slowly. You probably know how to ride a bicycle 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 50 centimetres 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 your right. If it is behind you, the light will reflect on tne screen. If the window is in front of you, left or the sun and the screen wii boh 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 something, 2) keep your elbows at the same height as the keyboard, and 3) stop sometimes and exercise your hands, wrists and fingers 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 your thighs should all be parallel 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.