患者，女，20岁，未婚。月事非时而下，量多如崩，色鲜红，质稠，伴心烦，口渴，便干溲黄，面部痤疮，舌红苔薄黄，脉数，此属（）。

A.肾虚不固

B.瘀阻胞络

C.阴虚火旺

D.脾虚不摄

E.热伤冲任

In the International Code of signals，a group of three letters indicates（）.

A.urgency or an emergency

B.the vessel's national identity signal

C.a group from the general signal code

D.a group from the medical signal code