A client with coronary artery disease reports intermittent chest pain that occurs with exertion. The physician prescribes sublingual nitroglycerin. When teaching the client about nitroglycerin administration, the nurse should include which instruction ？（）

A．"Be careful after taking nitroglycerin because it may cause dizziness. "

B．"Make sure you replace your nitroglycerin tablets every 6 months to ensure potency. "

C．"A burning sensation after taking nitroglycerin indicates medication potency. "

D．"When you experience chest pain, take one tablet every 30 minutes until the pain is relieved. "

同仁乌鸡白凤丸的功能是（）

A.理气和血，调经止痛

B.滋阴清热，固经

C.补气养血，调经止带

D.舒肝健脾，养血调经

E.补血调经，清热利湿