---I don't suppose the police know who did it.

---Well, surprisingly they do. A man has been arrested and ____ now.

A．has been questioned

B．is being questioned

C．is questioning

D．has questioned

患者，男，42岁。症见左下肢皮色紫暗，抬高时苍白，足背毳毛脱落，皮肤肌肉萎缩，趾甲变厚，趺阳脉搏动消失，患肢疼痛持续，夜间为重，舌暗红，脉沉细而涩。

上例患者当选何方药（）

A.阳和汤、独活寄生汤

B.四妙勇安汤、顾步汤

C.十全大补汤、人参养荣汤

D.六味地黄丸

E.桃红四物汤