鼻梁部皮肤出现红色斑块，病损处高起皮面并向两侧面颊部扩展，见于（）。

A.酒渣鼻

B.黑热病

C.肝脏疾病

D.二尖瓣面容

E.系统性红斑狼疮

He _________ desperately in vain for something to say to break the silence.

A．thought about

B．cast about

C．talked about

D．set about