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.

用超声波流量计来测量煤泥水流量其精度要高于电磁流量计。