既能清热凉血，又能活血散瘀的药物是（）

A.玄参、生地黄

B.水牛角、牡丹皮

C.知母、黄柏

D.赤芍、牡丹皮

E.大黄、栀子

The eastern bluebird is considered the most attractive bird native of North America by many bird-watchers.

A．native

B．native with

C．native by

D．native to