男性,50岁,近2周出现尿少、腹胀,肝肋下4.0cm,压痛(+),双下肢轻度水肿。下列检查中对确诊右心衰竭最有意义的是()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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