單項選擇題患者,女,47歲。五心煩熱,潮熱盜汗,腰酸腿軟,行走無力,舌質(zhì)紅,脈細。用藥應(yīng)首選的藥物是()

A.龜甲
B.牡蠣
C.知母
D.黃柏
E.地骨皮