A 32-year-old client is admitted to the unit. She states, "I’m a well-known, wealthy designer," and begins to order the nurses to prepare her bath while she orders her tray and telephones her colleagues. Her husband states that she’s too busy to eat and sleep and is losing weight. Her admitting diagnosis is bipolar disorder, manic phase. For which of the following events should the nurse plan

A. Erratic and unpredictable behavior if challenged.
B. Boredom and the need for minute-to-minute activities.
C. Rapid mood changes from elation to depression.
D. One-to-one treatment to occupy the client’s tim

在社会主义市场经济体制下，对市场起着主要的调节作用的是( )机制。

A．运行

B．动力

C．竞争

D．价格