—Would you mind if I open the window?

---_______. We need fresh air.

A．Not at all

B．Yes, of course

C．You’d better not

D．That’s all right.

下列中，单纯性肾病的临床表现可有（）

A.水肿呈非凹陷性

B.有时并有胸腔积液、腹腔积液

C.躯干水肿明显

D.水肿随体位而变化

E.以上都不是