英语语法分析

Significant past history included chronic cholecystolithiasis and gastric ulcer.

既往有慢性结石性胆囊炎、胃溃疡病史。

METHODS: The 160 patients with cholecystolithiasis were randomly divided into 2 groups.

方法：将160例胆囊结石病人随机分为2组。

Objective to explore operative method and points for attention of chronic atrophic cholecystolithiasis.

目的探索慢性萎缩性胆囊炎并胆囊结石的手术方法及注意事项。