— Sorry to keep you waiting.      

— ______. I've just been here for 10 minutes. [ ]

A. Sure

B. You're right

C. It doesn't matter

D. That's right

急性肾衰竭伴心功能不稳定和多器官功能衰竭者。治疗宜采用（）

A.血液透析

B.连续性肾替代治疗

C.腹膜透析

D.单纯超滤

E.3%高渗盐水静滴