GWD 21-4
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 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 (B)
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
b in fact 修饰的可真不清楚啊
对文章最后一句心存疑惑，谁给翻译下？
Clearly, using this test, doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before, since .
使用现在这个test 医生可以大幅避免不必要的移除 而不减少必要的移除
简言之 减少没病却被开刀的同时 有病却没检查出的不会应而增加
这是因为....这个测试的误诊只会出现没病却诊断有病
FYI
本题关键是without, however, performing any fewer necessary ones than before。
因为新方法有2%的误诊，要达到进行的必要的手术（即病人确实得了阑尾炎）不比原来有任何减少（原来的方法可以认为是指进行了不必要的手术，得病的都做了手术）。那么，新的方法必须保证，误诊的2%是没有阑尾炎而被判为有阑尾炎的。否则，新方法就有可能performing any fewer necessary ones than before了。
顶
Clearly, using this test, doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before, since .
使用现在这个test 医生可以大幅避免不必要的移除 而不减少必要的移除
简言之 减少没病却被开刀的同时 有病却没检查出的不会应而增加
这是因为....这个测试的误诊只会出现没病却诊断有病
FYI
. t he misdiagnoses produced by this test are always instances of attributing appendicitis to someone who does not, in fact, have it
这是因为....这个测试的误诊只会出现有病却诊断没病,
同意作者的思路, 但是有细节刚好译反了.
原文说新方法可以减少不必要的手术，而实际情况是手术数量并没有减少
B说是因为2%的误珍都是把没的说成有的了
有一点疑惑是
B言下之意就是98%都是该做手术的
那不是和原文20%的都没必要做手术矛盾了吗
还请高人指点
Clearly, using this test, doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before, since .
使用现在这个test 医生可以大幅避免不必要的移除 而不减少必要的移除
简言之 减少没病却被开刀的同时 有病却没检查出的不会应而增加
这是因为....这个测试的误诊只会出现没病却诊断有病
FYI
. t he misdiagnoses produced by this test are always instances of attributing appendicitis to someone who does not, in fact, have it
这是因为....这个测试的误诊只会出现有病却诊断没病,
这是因为....这个测试的误诊只会出现有病却诊断没病,
同意作者的思路, 但是有细节刚好译反了. 同意butterfinger的翻译, 不同意:
同意butterfinger的翻译,
不同意:
同意作者的思路, 但是有细节刚好译反了.
同意butterfinger的翻译,
但不同意:
这是因为....这个测试的误诊只会出现有病却诊断没病, 同意作者的思路, 但是有细节刚好译反了. 同意作者的思路, 但是有细节刚好译反了.
同意作者的思路, 但是有细节刚好译反了.
同意作者的思路, 但是有细节刚好译反了.
我方观点:如果有病诊断没有病就不是不会通过那个系统治疗,也就不存在误诊
我認為誤診的2%，是出現有病但未診斷出，醫學上簡稱 false negative .若是沒病卻被診斷出有病 (false positive)，就會進行移除手術了，與題目中敘述 avoid unnecessary removals 此一事實相違背了。
該題答案C是否比較合理?
ding
doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before
1.不该做的大大减少（不是完全避免）
2.该做的比之去年不会减少
文章说98%全对，以前似乎只有80%。保证了1。
B：2个误诊的全是把没有的说成了有，那就保证了2，该做的都做了，就剩了2个不该做的。
自己做的时候没有注意 largely avoid unnecessary removals ，而是自以为的想成了完全避免，造成误选。
doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before
1.不该做的大大减少（不是完全避免）
2.该做的比之去年不会减少
文章说98%全对，以前似乎只有80%。保证了1。
B：2个误诊的全是把没有的说成了有，那就保证了2，该做的都做了，就剩了2个不该做的。
自己做的时候没有注意 largely avoid unnecessary removals ，而是自以为的想成了完全避免，造成误选。
解释的太清楚了。谢谢！我好几个题都是看了你的解释后明白的。不愧为逻辑帮主。
我認為誤診的2%，是出現有病但未診斷出，醫學上簡稱 false negative .若是沒病卻被診斷出有病 (false positive)，就會進行移除手術了，與題目中敘述 avoid unnecessary removals 此一事實相違背了。
該題答案C是否比較合理?
C错
如果所有被这个test检测出有病的人都有病的话~
那么被检测出没病的人就有可能有病或者有可能没病~
如果没病就不是误诊，即不存在误诊，与原文producing two misdiagnoses for every 98 correct diagnoses矛盾
如果有病还被检测出没病（即必要的手术），这就减少了必要的手术，与原文without performing any fewer necessary ones than before相矛盾
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