Shortly after being admitted to the coronary care unit with an acute myocardial infarction (MI), a client reports midsternal chest pain radiating down the left arm. The nurse notices that the client is restless and slightly diaphoretic, and measures a temperature of 99. 6°F (37.6℃), a heart rate of 102 beats/minute; regular, slightly labored respirations at 26 breaths/minute; and a blood pressure of 150/90mmHg. Which nursing diagnosis takes highest priority ？（）

A．Risk for imbalanced body temperature.

B．Decreased cardiac output.

C．Anxiety.

D．Acute pain.

依次填入下列各句空缺处的词语，最恰当的一组是( )。 ①只有多一点直面废墟的勇气，理解废墟所______的公理和道义，对历史保持清醒的态度，社会才会不断走向进步和繁荣。 ②他在担任省劳动厅长期间，违反组织人事纪律，______职权先后将未经考试或考核的10名亲属录用为干部。 ③涉及到干部______的改革，更要慎重。

A．揭示 乱用 体制

B．昭示 滥用 机制

C．昭示 滥用 体制

D．揭示 乱用 机制