患者男性，21岁，1小时前因车祸致胸部挤压 伤，来院急诊。体检：意识清醒，气急，血压 低，脉率快，眼睑结膜及头面部皮下广泛紫罗 蓝色点状瘀血斑，双肺听诊散在湿啰音。胸片 未见明显异常。此时，最适当的急诊处理是

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