标题: 问一道逻辑题 Appendicitis [打印本页] 作者: gwinyu 时间: 2009-12-9 09:30 标题: 问一道逻辑题 Appendicitis Appendicitis Which of the following most logically completes the passage? Appendicitis (inflammation of the appendix) is potentially fatal;consequently, patients with symptoms strongly suggesting appendicitisalmost have their appendix removed. The appropriate surgery is low-riskbut performed unnecessarily in about 20 percent of all cases. A newlydeveloped internal scan for appendicitis is highly accurate, producingtwo misdiagnoses for every 98 correct diagnoses. Clearly, using thistest, doctors can largely avoid unnecessary removals of the appendixwithout, however, performing any fewer necessary ones than before,since .
A. the patients who are correctly diagnosed with this test as nothaving appendicitis invariably have medical conditions that are muchless serious than appendicitis B. the misdiagnoses produced by this test are always instances ofattributing 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 appendicitishas more than one of the symptoms generally associated with appendicitis E. the only patients who are misdiagnosed using this test are patientswho lack one or more of the symptoms that are generally associated withappendicitis作者: fearfree 时间: 2009-12-9 11:47
阑尾炎潜在性的致命。。经常建议被切除。。有20%的case是并无必要的被切除。。新方法。。2%的错误率。。适用此方法可以大量避免不必要的切除而又不至于做少必要的切除手术，由于: （不少做必要手术，就是必须切的都切了，诊断错的情况只有不必须切的也切了-此为2%）
