一道逻辑的JJ,请大家看看

丑得老婆哭

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

howardwang

答案应该没错的（注意结论的具体性阿，any fewer necessary ）！

心态平和，坚定信心，集中精力，消灭小E.

祝你后天好运！

丑得老婆哭

题后说的是"医生在很大程度上可以避免不必要的移除手术并且可以不实施任何一个不必要的手术".

B说的是误诊是把没病的诊断成有病的啊

wangyaoo

wow, this is the new JJ of this month! Super strong!

z520m

楼主的答案哪里来的？我觉得应该是C,因为所有查出来有病得都有病。

z520m

昏头了，刚刚发言无效，答案确实为B.题目说的是医生能够largely aviod without 漏过所有必要的手术，B说的正是所有2%的错误都是属于没有病的人，就是说有病得都能查出来，只有2%是把没病的当有病的，可是以前这个错误率为20%。确实largely aviod了不必要的手术!

zimmer5

可以大幅avoid unnecessary removals of the appendix ,同时不会减少必要的performing any fewer necessary ones than before

是因为这个test只会把没病的诊断为有的，（而不会把有的诊断成没有的）

丑得老婆哭

谢谢,那个句子读起来太拗口了