[求助]GWD21-Q4

samuelxie

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

论坛上的解释我搜过了
看不明白
B项的翻译有两个版本 一个是有病的被诊为没病了 我同意这个
                           还有一个是 没病的被诊断为有病了 这个我不同意啊
  题目的意思也不甚明白
真的很绕 又没人帮帮忙啊

teddyabc

就是这样的阑尾炎以前经常被误诊，20%的人实际没有患病却被开了刀。现在有了技术，能精确得知是否有病，但还是有98%的误诊率。然后填空部分是要填出：误诊是因为 没有诊断出实际患病者

B选项说明误诊通常是发现了阑尾炎，但将这些病归到了每患病的人身上，因此，实际患病的人没有被诊断出来

flyfairy019

这题应该选B，极少数的误诊发生在将没有阑尾炎的病人误诊为有阑尾炎的病人。

Clearly, using this test, doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before, since ______.

这里我认为有两个关键的点：
can largely avoid意味着不能完全避免unnecessary removals
any fewer意味着那些被remove的人数不会比确应得到治疗（necessary，即患阑尾炎）的少，也可能多于neccessary的人

timothyyung

这道题我是这样理解的哈〜〜clearly后问的是医生能很大程度上避免不必要的手术，但又不会减少必须手术的数量，言外之意就是减少的是不必须手术的数量，所以〜〜〜〜b

lysdelyon

同意楼上的解释，B说的是把没的误诊为有病的了，排除了一种削弱的可能，就是如果相反，把有病的误诊为没病的，就会出人命了，这种误诊是不能原谅的，这种技术对误诊率的降低就没价值了

sunzehua700

我的理解：

without, however, performing any fewernecessary ones than before（不会是使必要的手术减少）, since ___应该解释2/98的误诊___.
误诊分为：1、漏诊（将阑尾炎诊断为无阑尾炎，减少必要的手术）；2、将无阑尾炎诊断为阑尾炎，增加不必要的手术，但不减少必要的手术）

yidiyuehans

结论就是医生使用这种方法可以显著降少误诊然后抱住不漏诊，因为（这个test是可靠的）
B项：这个2%的误诊是很定的——>test的准确是可靠的，符合答案

liexodus

不漏诊的定义就是 把没有病的当成有病的。B选项就是这种情况

而如果把有病的当成没病的，就是漏诊了，不符合原文最后一句