英语语法分析

Analyze the etiology, therapeutic methods and curative effect of postoperative gastroplegia syndrome (PGS) after radical colectomy and proctectomy.

分析结直肠癌术后胃瘫综合征（PGS）发生的病因、治疗方法和疗效。

Objective To analyze the etiology, therapeutic methods and curative effect of postoperative gastroplegia syndrome(PGS) after radical colectomy and proctectomy.

目的探讨结直肠癌术后胃瘫综合征（PGS）发生的病因、治疗方法和疗效。