患者,女性,22岁,海边玩耍时不幸溺水。被救出后意识丧失,大动脉搏动及呼吸消失,皮肤发绀。现场护士抢救的首要步骤是( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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