任务型读写（共10小题；每小题1分，满分10分）
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As more students begin to use computers for longer periods of time, more of them are suffering from eyestrain （视疲劳）．Just a few hours in front of a computer screen can make a person’s eyes feel tired and painful．A number of eye doctors have studied this growing problem and have found ways to deal with it．Following their advice will help keep computer users more comfortable．Here is some of the advice．
The light in a room shouldn’t be brighter than the computer screen itself．In many classrooms, however, the lights are far brighter than they should be．．Students can block some of this light by wearing baseball caps if they’re allowed at school．
A special computer screen should be used to cut down on bright light because it is especially tiring to the eyes．Another problem to avoid is the wrong kind of contrast．It is best to have dark letters on a light background．This causes less eyestrain than light letters on a dark background．
Students should be seated so that they are looking down at the computer screen rather than straight ahead, which is a far more tiring angle．The top of the monitor should be slightly lower than the top of the head．
The length of time students spend in front of a computer screen leads greatly to eyestrain．Students should take frequent breaks by looking away from the screen every fifteen or twenty minutes．During that time they should either close there eyes or focus on an object at a distance. Long – term computer use can dry out the eyes, so students should remember to blink frequently while in front of the screen.
Title: Computers and Eyestrain
Common Problems  Doctor’s      
Room
lighting     Much brighter in many classrooms          Get the light   bright.
       something to block the light.
The screen       Too bright light.
Wrong kind of contrast.
Light letters.         the strong light.
Use the        kind of contrast.
Have dark letters on a light background.
      The top of the screen
      than the top of the head. Sit were you won’t look    at the serene.
Time        Spending too much time
     a computer screen.         your eyes for a moment.
Look at something at a distance.
Blink often while using a computer.