Which of the following signs and symptoms would be an early indication that the client’s serum potassium level is below normal

A. Diarrhea.
B. Tingling in the fingers.
C. Sticky mucous membranes.
D. Muscle weakness in the legs.

面对固执己见型客户的投诉处理建议不正确的是（）。

A.说话委婉

B.据理力争

C.先表示理解

D.引导客户站在互相理解的角度解决问题