surgery is a branch of medicine ① which specially trained doctors, called surgeons, treat patients by operating on them. the removal of an appendix is a fairly common example of a surgical treatment. surgery is sometimes combined with other ② treatments, such as drugs or chemotherapy (used on tumors). machines, such as a special camera called a laparoscope, ③ have enabled surgeons to see inside the body as they perform operations. this technique means ④ that the surgeons need to make only a small incision, or cut, in the body. the patient has very little pain afterward and recovers ⑤ much more quickly as a result.

답이 1번인것 같은데, 왜 그런지 이유는 잘 모르겠네요 설명 부탁드립니다.