经上述非手术治疗2～4周，截瘫不见恢复，各项检查均在正常范围内，MRI显示硬膜囊前方有压迫，下一步最宜采取的治疗是

A．联合应用多种抗结核药物，并加大剂量，调整给药方法

B．施行脊椎融合木

C．施行椎板切除减压术

D．加用中药、针灸治疗

E．施行前外侧减压术

My sister_______ the League last month and she has decided to _______ the activity to help the aged next week.

A．joined; join in

B．took part in; join

C．joined; attend

D．joined in; join in