In providing discharge teaching for the client after a modified radical mastectomy, the nurse should instruct the client that she might need to modify or avoid which of the following activities

A．Shampooing her dog.

B．Caring for her tropical fish.

C．Working in her rose garden.

D．Taking a late-evening swim.

能说明药品作为特殊商品的确切概念是（）

A.专属性

B.时限性

C.两重性

D.公益性