[1] Of course computers are great, and have changed some people's lives for the better. However, they can cause problems too. Many people who use computers a lot can get physical(身体的) problems. They find that their eyesight gets worse, for example, if they look at the screen for too long. There can be injuries in computer users' hands and arms from making the same movements thousands of times, as people do with keyboards and a mouse. People who have computers are also spending more time sitting down, and less time exercising, so many of them are becoming overweight.
[2] Other problems are psychological(心理的). One example is stress(压力). Computers, the Internet and email have made many people's lives much faster. This can be very exciting, but it also means that people feel under a lot of pressure(压力) to do everything more quickly, which is stressful.
[3]
more and more young people. Many people have become addicted(成瘾的) to using the Internet and chat rooms. They can spend hours and hours in chat rooms and surfing the net, sometimes until very late at night. This means they can't work or study properly and can have problems keeping friends.
[4] Some studies in the United States have suggested that young children and teenagers who spend many hours at computers can get lonely and even depressed.
[5] "Computers can be a really positive part of children's lives. But parents and teachers need to help them learn to use computers in responsible and creative ways," says teacher Jane Shields. "And children need to learn when it is time to log off(登出) and do something different."
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