托烷司琼不同给药时间预防乳腺癌改良根治术后恶心呕吐的疗效观察
탁완사경불동급약시간예방유선암개량근치술후악심구토적료효관찰
Curative effect observation of tropisetron at different administration time to prevent breast cancer modified radical postoperative nausea and vomiting