求解答~

arieslee0410

GWD7-Q17:
Of patients over 65 years old who survived coronary bypass surgery—a procedure widely prescribed for people with heart disease—only 75 percent benefited from the surgery.  Thus it appears that for one in four such patients, the doctors who advised them to undergo this surgery, with its attendant risks and expense, were more interested in an opportunity to practice their skills and in their fee than in helping the patient.
Which of the following, if true, most seriously undermines the argument?

D.    The patients over 65 years old who did not benefit from the coronary bypass surgery were as fully informed as those who did benefit from the surgery as to the risks of the surgery prior to undergoing it.
E.    The patients who underwent coronary bypass surgery but who did not benefit from it were medically indistinguishable, prior to their surgery, from the patients who did benefit.
D为什么不对呢？求讲解~

fanfantastic

题目中说的是，事实：有25%的人没有因这个手术获益，结论：建议他们做这个手术的医生是为了练习自己的手术技巧以及收取费用，而不是为了帮助病人。
削弱
D 那些做了手术但没有好转的病人和好转了的病人在手术前都被告知了手术的风险
不能推出医生不是出于自己的私利而对病人进行手术