王女士,诊为慢性呼吸衰竭,近日因咳嗽、咳痰、气促叻显,又出现神志不清、发绀、多汗,血气分析PaO2 50mmHg, PaCO2 62mmHg,应给予患者( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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