英语语法分析

To study gastroscopic features and clinical diagnosis of prepyloric membrane.

探讨幽门前瓣膜症的胃镜特征与临床诊断。

Results The veracious rate of gastroscopic biopsies in early gastric cancer was 80.87%.

结果胃镜活检对早期胃癌的确诊率为80.87%。

Objective To evaluate the effect of gastroscopic assistant operation for children with pyriform sinus fistula.

目的分析儿童梨状窝瘘反复发作的原因，介绍胃镜辅助手术方法及其优越性。