保守的缺口管理是指商业银行在日常经营过程中为规避利率风险，尽量做到资产和负债的匹配与均衡，保持缺口（利率敏感性缺口或久期缺口）（）。

A.为零或接近零风险

B.为正

C.为负

D.任意数值

In all but the most severe cases，bleeding from a wound should be controlled by（）.

A.applying direct pressure to the wound

B.submerging the wound in lukewarm water

C.cooling the wound with ice

D.applying a tourniquet