患者男性,48岁,诊断为支气管扩张,咯血100mL后突然出现胸闷气促、张口瞪目、两手乱抓、大汗淋漓、牙关紧闭。对大咯血出现窒息征象者的护理措施正确的是( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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