求助gwd一题

ypl214

4. 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

这句题干最后一句without后面是什么意思

ypl214

貌似明白了

ypl214

我还是不明白问题的最后一句话什么意思

ypl214

对啊

agnesliu

原文意思：新扫描仪减少了不必要的手术，同时，该做手术的人还是会做手术
推测：那么误判的那两个应该是“不该做手术却被判做手术的"，而不是"该做却没做手术的"，其后果大不了多切两个不该切的，而不是留两个该切的却不医治造成致命的后果。
选B，对吗？

ypl214

大家有会的吗