The client with a lumbar laminectomy asks to be turned onto his side. What should the nurse do

A. Inform the client that because of his laminectomy, he may only lie supine.
B. Ask the client to help by using an overhead trapeze to turn himself.
C. Turn the client’s shoulders first, followed by his hips and legs.
D. Get another nurse to help log roll the client into position.

行业竞争结构是（）的研究内容。

A、“天”

B、“地”

C、“彼”

D、“己”