问答题 3.  Direction: For this part, you are allowed 30 minutes to write a short essay entitled Computer and Short-sightedness based on the statistics provided in the chart below. Please give a brief description of the line chart first and then make comments on it. You should write at least 120 words but no more than 180 words.
   
【正确答案】[范文]
   
Computer and Short-sightedness

   According to the line chart, we can see the percentage of computer users in youth rose dramatically from about 8% in 1995 to 75% in 2015. Simultaneously, the chart also shows a sharp increase in China's percentage of short-sighted persons who use computers in youth, from about 11% to 72% during the same period.
   It is known that staring at computer screens too long will make your eye muscles tense and eyeball more lengthened, which may increase the risk of short-sightedness. This is especially the case for children and young adults, whose eyes are still developing. To prevent short-sightedness, you should give your eyes regular rests from looking at the screen for five to ten minutes every one or two hours of computer use. Besides, simply try to reduce the amount of time you spend on computer.
   We have to admit that the computer is playing a significant role in our daily life. But short-sightedness is harmful, so we must use computers in a correct way.
【答案解析】
   这是一篇折线图类型的图表作文。显示了1995~2015年间,中国青少年电脑使用者比例正逐年上升,从8%增加到75%,并显示了同一时间段内这些人中患近视的人数百分比从11%急剧上升至72%。可见电脑的广泛使用增加了青少年患近视的风险。在读懂数据的基础上,结合题意,全文可安排如下:
   第一段描述曲线图内容。
   第二段可分析产生这一现象的原因及如何预防处理。
   第三段进行总结——电脑在我们的日常生活中起着很重要的作用,但近视危害很大,应正确使用电脑。