2.although the ratio of physicians to total population is about the same in the US and Canada, the US has 33% more surgeons per capita. clearly , this is the reason people in the US undergo 40% more operations per capita than do canadians. 答案是A: patients in the US do not have a greater need for surgery than do patients in Canada. 我实在是搞不明白,内外科分开的讲,还是不明白.operation指内科手术么?