29. --- Do you know that man?

--- Not really, just a nodding _______.

A．acquaintance

B．participant

C．relation

D．frequent

病人患肢暗红，足背汗毛脱落，趾甲变厚，足背动脉搏动消失；患肢持续性静止痛，尤以夜间为重，甚则抱膝而坐。舌质红或紫暗，脉沉细而涩，治法是( )

A．清热解毒止痛

B．温阳通脉散寒

C．活血通络止痛

D．升提补气养血

E．以上都不是