John, may I use your computer now?

Sorry, it is not ____at the moment. It is being repaired.

A．convenient

B．valuable

C．available

D．comfortable

患者曾发高热，热退而见口鼻、皮肤干燥，唇舌干燥，舌紫绛边有瘀斑、瘀点。其病机是（）。

A.津液不足

B.津亏血瘀

C.津枯血燥

D.津停气阻

E.气阴两亏