请大家都来帮我看看这道逻辑题

linlin2008

Although the ration of physicians to total population is about the same in US and canada, US has 33% more surgeons per capita.Clearly, this is the reason people in US undergo 40% more operations per capita than do Canadians. The explaination given above rests on an assumption that:

A, patients in US do not have a greater need for surgery than do patients in Canada.
B, the population of US is not larger than that of Canada.
C, US patients sometimes travel to Canada for certain kinds of surgery.
D, general practitioners in US do not as a rule examine a patient who is a candidate for surgery before sending the patient to a surgeon
E, there are no unnecessary surgical operations performed in Canada.

大家说说吧。

再问这题是前半部分是原因 而后推出后半个结果。还是后半部分是原因 而后得出前面的结果?

fhhrewr

看题目，当然是前面是解释后面结果的原因
答案是D，否定一种可能性

girls

感觉楼主做逻辑题目又陷入了用技巧的“陷阱”，过多的技巧只会带来麻烦和矛盾，BTW,技巧针对GRE阅读好一些，因为GRE逻辑要求较低。

原文EVIDENCE说美国比加拿大的PER CAPITA的SURGEON 多33％，但推出的结论是“因为美国比加拿大的PER CAPITA的OPERATION多40％,问假设，很明显本推理要想成立需要一个假设条件，这个条件就是寻找一个能够把33％和40％连接起来的答案。
看选项：
D正好满足这个条件，其他选项均不合适！

搂住明白了？如果你一定要用A-B或者B-A的理论技巧，我也多说2句：因为原文是从结论推原因，所以应该是B-A模式，不过不管哪个模式，读懂段子和理解原文是最重要的！！！！