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题库 / OG2018-CR-643
The kinds of hand and wrist injuries that result from extended use of a computer while maintaining an incorrect posture are common among schoolchildren in Harnville. Computers are important to the school curriculum there, so instead of reducing the amount their students use computers, teachers plan to bring about a sharp reduction in the number of these injuries by carefully monitoring their students’ posture when using computers in the classroom.
Which of the following would it be most useful to know in order to assess the likelihood that the teachers’ plan will be successful?
Whether extended use of computer while maintaining incorrect posture can cause injuries other hand and wrist injuries.
Whether hand and wrist injuries not caused by computer use are common among schoolchildren in Harnville.
What proportion of schoolchildren in Harnville with hand and wrist injuries use computers extensively outside the classroom.
Whether changes in the curriculum could reduce the schools’ dependence on computers.
What proportion of schoolchildren in Harnville already use correct posture while using a computer.
情景：在H的学校学生们手部和踝关节受伤的情况非常常见。电脑在学校课程中非常重要，不能舍弃。因此，老师们就打算通过监测学生姿势的方式来减少受伤率。
推理：本题的问题，包括文段都是明显的方案推理。
目标：为了减少受伤率
方案：小心地监测学生的姿势
选题方式：答案选项必须和方案相关。
选项分析：
A选项：是否以不正确的方式使用电脑会导致除了手和手腕的伤害？本选项和老师的方案无关。
B选项：是否非由用电脑导致的手和手腕的伤害在H的学生中是普遍的？非用电脑导致的伤害与方案的目标都无关，更别说是方案了。
C选项：Correct. 有多少比重的有手腕和手伤害的学生是在教室外过度的用电脑导致的？如果有很高比例的学生是这么受伤的，那么仅仅在教室内进行检测，自然无法达成减少受伤率的目的。属于CQ1：方案的可行性问题。
D选项：是否改变课程可以减少学生对电脑的依赖。本选项和方案无关。
E选项：有多少比重的在H的学生在用电脑时已经用上了正确的姿势。就算这比重很高，老师的细心检测也会在一定程度上降低一点受伤率（毕竟还是有小孩不用正确姿势的嘛）。
对于E选项，OG的解释是说”The kinds of hand and wrist injuries that result from extended use of a computer while maintaining an incorrect posture are 【common】 among schoolchildren in Harnville”表明用不正确的姿势导致受伤的proportion已经high enough!
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