Hastings‘ contracture is a disorder of the connective tissue in one or both hands, most commonly causing loss of mobility. A survey of thousands of medical-insurance claims found that over 30 percent of people who had one hand operated on for Hastings'contracture underwent surgery a second time for this disorder within three years. Clearly, therefore, a single surgical treatment of Hastings' contracture is often ineffective at providing long-term correction of the disorder
Which of the following, if true, most seriously weakens the argument? (A) The medical-insurance claims did not specie whether the surgery was on the patient's right or left hand. (B) The surgical techniques used to treat Hastings' contracture are identical to those used successfully to treat certain work-related injuries to the hand. (C) A separate survey found that 90 percent of patients operated on for Hastings' contracture report increased hand mobility within one month after the surgery. (D) All of the patients in the survey were required by their insurance companies to seek a second opinion from a qualified surgeon before undergoing the operation. (E) Many people who have Hastings' contracture choose to tolerate its effects rather than undergo the risks of surgery.
答案是A,CD为何不对呢?排除它因?
但是D我可以理解为病人是在手术前被保险公司要求组进行二次手术的,而并非是因为一次手术无效?
追答D的意思是
All of the patients in the survey were required by their insurance companies to seek a second opinion from a qualified surgeon before undergoing the operation.
调查里的那些病人,在进行手术前,保险公司都要求他们向优秀的外科医生询问建议。
怎么可以理解为保险公司要求他们做二次手术呢?
a second opinion在这里是补充意见的意思,不能理解为二次手术~ 关键还是对D理解的问题吧,AC懂了吗?