—What’s the matter with John?

—He’s had his leg ______ trying to save a boy from a fire.

A．wounding

B．wounded

C．being wounded

D．to be wounded

唇部因触摸等诱因多次发生阵发剧痛，近半年发作频繁，疼痛剧烈难忍。初起卡马西平治疗有效，近来服药无效。

根据目前病情哪种治疗为首选（）。

A.加大卡马西平剂量

B.行三叉神经病变支撕脱术

C.2％普鲁卡因三叉神经病变支封闭

D.三叉神经病变支95％局部注射

E.三叉神经病变支射频电凝术