英语语法分析

For control group, pethidine were injected intramuscularly.

对照组肌内注射哌替啶。

The recommended single dose is 1 ampoule, given subcutaneously, intramuscularly or intravenously.

建议一次剂量为1安瓿，皮下，肌肉或静脉注射给药。

In the experimental group, zinc sulfate was given intramuscularly each day, beginning 2 days before operation.

供锌组于手术前2天起经肌肉供给硫酸锌。