关于护理诊断的描述，正确的选项是 （）

A.一个患者首优的护理诊断只能有一个

B.护士可参照马斯洛的需要层次论进行排序

C.首优的护理诊断解决之后再解决中优问题

D.现存的护理诊断应排在"有……危险"的护理诊断之前

E.对于某个患者来说，护理诊断的先后次序常常是固定不变的

--- Could you tell us ______?         ---- About two weeks.

A．how often are we going to be away

B．how often we are going to be away

C．how long are we going to be away

D．how long we are going to be away