While a client with hypertension is being assessed, he says to the nurse, "I really don’t know why I’m here. I feel fine and haven’t had any symptoms. " Which of the following would be the nurse’s best response

A. "Symptoms of hypertension are often not present. "
B. "Symptoms of hypertension signify a high risk of stroke. "
C. "Symptoms of hypertension occur only with malignant hypertension. "
D. "Symptoms of hypertension appear after irreversible kidney damage has occurred. "

下列哪项不是煎膏剂的特点

A．有效成分浓度高

B．体积小

C．易保存

D．容易变质

E．便于服用