The nurse is giving home care instructions to a client who just had a cataract removed and an intraocular lens implanted. What should the nurse tell the client

A. Don’t sleep on the operated side.
B. Wear the eye shield continuously for 2 weeks.
C. Aspirin may be taken for mild pain.
D. Straining during bowel movements is allowe

简述受众控制的含义与表现形式。