会阴湿热敷最常用的药液是（）

A.50%硫酸镁

B.4%碳酸氢钠

C.1：5000高锰酸钾

D.0.5%醋酸

E.75%乙醇

_________you have expressed your fierce determination to get it right, you should act immediately.

A．Even though

B．Ever since

C．Now that

D．As though