女性，28岁，GP，幼年患过肾炎已愈，现孕28周，血压130／80mmHg，宫高25cm，蛋白尿（++），双顶径68mm，还需进行的最重要的检验是（）

A.血清肌酐，尿素氮

B.体重

C.24小时尿蛋白定量

D.血浆蛋白含量

E.肝功能

Discretionary fiscal policy can be defined as:（）

A. a situation in which total government spending exceeds total government revenue during a specific time period, usually one year. 

B. a change in laws or appropriation levels that alters government revenues and/or expenditures. 

C. a situation in which total government spending is less than total government revenue during a time period, usually one year.