请大家帮忙看下~~GWD 洛基！！！

templars

. GWD21-Q4:

Which of the following most logically completes the passage?



Appendicitis(阑尾炎) (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(附录、阑尾)
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 itC.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

答案B，如何理解！！！还有without+红色的地方如何来翻译！！！

piacia

就是说 医生可以大大降低不必要的手术 而且 不会降低做必要的那些手术

因为像B所说的，那些误诊都是吧 没有 变成 有， 不会把 有 变成 没有。所以不会做少手术！

templars

能不能帮忙翻译下句子B呢~觉得读起来好怪呢~
谢谢！！!

piacia

尽量试试看哈

the misdiagnoses produced by this test are always instances of attributing appendicitis to someone who does not, in fact, have it

那些误诊 是由于 测试经常把那些 事实上没有（阑尾炎）的人 判断为 有阑尾炎 所产生的。

templars

恩~明白了~
但是题目中的逻辑推导是怎么样的呢？感觉还是糊糊的~关误诊的什么事？
能不能这样想：那些误诊的都是没有阑尾炎的人，所以就算医生对他们做手术，也不会对他们身体有什么伤害？

xiaoaojiang

把没有的误诊为有的，对他们做了手术，这个手术就是不必要的啊~~

ddwantsmba

Clearly, using this test, doctors can largely avoid unnecessary removals of the appendix(附录、阑尾)without, however, performing any fewer necessary ones than before, since ______.
我觉得是，有了这个，医生大大避免了不必要的割除，！但是！必要的割除也比以前少了。。。。。。

所以应该选解释为什么必要的手术比以前少了。。。。B正好提供了解释，因为有这个test得出的误诊都是那些本身有病，但是却被诊断成没病的案例！（换句话说就是解释了现在必要的手术反而减少了，因为这样的误诊多了嘛）

templars

谢谢啊！！我懂了~
我觉得我关键没有读懂题目的意思~
每次遇到without这个词，翻译老出问题了！