英语语法分析

Pethidine is no longer used as a choice for cancer pain.

哌替啶已不再作为癌痛治疗的选择。

For control group, pethidine were injected intramuscularly.

对照组肌内注射哌替啶。

Objective To study the application of pethidine and promethazine analgesia in RFA for liver cancer located under the diaphragm.

目的探讨度非合剂镇痛在射频消融治疗膈顶部肝癌的应用价值。