话务员在受理业务时，要坚持用“（）”开头，“请”字在中，“谢谢”结尾。

A、喂

B、您好

C、你好

D、对不起

A client is admitted to the emergency department with complaints of chest pain and shortness of breath. The nurse's assessment reveals jugular vein distention. The nurse knows that when a client has jugular vein distention, it's typically due to

A．a neck tumor.

B．an electrolyte imbalance.

C．dehydration.

D．fluid overload.