单选题 The writer implies that ______.

A、 difficult operation can be successfully performed all over the world now
B、 compared to the "third revolution" in surgery, the first two are less important
C、 all patients can be cured by a gall bladder-removal operation
D、 a new breakthrough has been made in surgery

【正确答案】 D

【答案解析】[解析]根据第五段的“The computer systems used to control surgical movement can also lead to a breakthrough in teaching surgical techniques to a new generation of physicians．”可矢口，D项为正确答案。