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　　参考范文：

　　As computers are being used more and more widely in our life，they have brought us a lot of convenience.However，attention should be paid to their bad effects on people’s health.

　　To begin with，the bright screen and the frequently-rolling words on it do much harm to our eyes，gradually weakening our eyesight.Besides，depending too much on computers may lead to a worse memory.Most importantly，when using computers，people tend to sit before them for a long time.That is why many people often feel uncomfortable on the back.And some may even get too fat.

　　To improve the situation，I think there should be a short rest every other hour to relax our eyes and brain.Moreover，people should avoid using computers unless necessary.We can keep out of the trouble they bring if we use them properly.

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