¡¡¡¡19. Although the ratio of physicians to total population is about the same in the United States and Canada£¬ the United States has 33 percent more surgeons per capita. Clearly£¬ this is the reason people in the United States undergo 40 percent more operations per capita than do Canadians.
¡¡¡¡The explanation given above rests on an assumption that
¡¡¡¡£¨A£© patients in the United States do not have a greater need for surgery than do patients in Canada
¡¡¡¡£¨B£© the population of the United States is not larger than that of Canada
¡¡¡¡£¨C£© United States patients sometimes travel to Canada for certain kinds of surgery
¡¡¡¡£¨D£© General practitioners in the United States do not as a rule examine a who is a candidate for surgery before sending the patient to a surgeon.
¡¡¡¡£¨E£© There are no unnecessary surgical operations performed in Canada.
¡¡¡¡Keys£º AAECB BBDCA DBCDE AADA
