标题: 讨论一道 狗狗逻辑 [打印本页] 作者: OliverJ 时间: 2010-1-29 17:22 标题: 讨论一道 狗狗逻辑 GWD21-Q4:? Which of the following most logically completes the passage?
Appendicitis (inflammation of the appendix) is potentially fatal; consequently, patients with symptoms strongly suggesting appendicitis almost always have their appendix removed. The appropriate surgery is low-risk but performed unnecessarily in about 20 percent of all cases. A newly developed internal scan for appendicitis is highly accurate, producing two misdiagnoses for every 98 correct diagnoses. Clearly, using this test, doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before, since ______.
A. the patients who are correctly diagnosed with this test as not having appendicitis invariably have medical conditions that are much less serious than appendicitis B. the misdiagnoses produced by this test are always instances of attributing appendicitis to someone who does not, in fact, have it C. all of the patients who are diagnosed with this test as having appendicitis do, in fact, have appendicitis D. every patient who is diagnosed with this test as having appendicitis has more than one of the symptoms generally associated with appendicitis E. the only patients who are misdiagnosed using this test are patients who lack one or more of the symptoms that are generally associated with appendicitis 看到750牛人 说有此原题 ，想了下有点犹豫。 我选B 看了讨论 有选C 也有选B。 到底选啥呀？
我的理由
B is the answer. The main problem we are dealing with is that there is a 2% mistake rate. That is not acceptable. If those 2% have appendicitis and the scan says they don't, they will die without surgery! However, B fixes this problem by telling us that all the mistaken scans (the 2%) error in favor of the patient...作者: 冷咖啡 时间: 2010-1-29 17:31
B！！！！！！！！！！！！！！！！！！！！！！！！作者: lzj1209 时间: 2010-1-29 17:48
B is right
the misdiagnoses produced by this test are always instances of attributing appendicitis to someone [who does not], in fact, have it
attribute appendicitis to some have it——误诊的是情况：判定某人得了阑尾炎，而此人事实上没有得who does not——宁可多做，也不放过——它能保证所有患病的人都做手术，同时without performing any fewer necessary ones than before作者: OliverJ 时间: 2010-1-29 17:56
谢谢楼上两位~作者: parris 时间: 2010-1-29 19:52
应该选C吧？Ｂ的意思不是说诊断没有，但实际有阑尾炎么？作者: parris 时间: 2010-1-29 19:59
是选B作者: fengranxu 时间: 2010-1-30 00:10
我认为也是B作者: ilearn2 时间: 2010-1-30 00:24
这题选B. 2楼的已经解释得很清楚了。