GWD21-Q4:求翻译。。。

Cecile8chen

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 ______.
最后一句话doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before，是什么意思？？？尤其是without performing any fewer necessary ones than before是什么意思？？？

Lhitachii

without performing any fewer necessary removals of the appendix than before

ximenheng

阑尾炎（阑尾的感染发炎）有可能是致命性的，因此，表现出阑尾炎症状的病患一般都选择阑尾切除手术。正确的手术风险很低，但是，有20%的手术是不必要的。一种新的阑尾炎内部检测有着很高的准确率，仅仅只有2%的误诊。很显然，采用这种检测方法，医生仍旧会对之前（检测方法）所（诊断出的）必要切除阑尾的进行手术（也就是说，以前该切的现在依然会切），同时医生可以极大地避免采取不必要的手术。（也就是说，那些以前不该切而被切的会很大程度的避免）

Cecile8chen

thanks