患者,男,60岁。咳嗽3个月伴咯血,近1 个月来进行性气急来院就诊。仰卧位时气急加重。体检:吸气性呼吸困难,见三凹征,两肺闻及喘鸣音。常规X线胸片未见明显异常。其诊断首先应考虑
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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