患儿，10天。因“少哭、少吃、少动7天，伴皮肤硬肿3天”人院。査体：T330C,R20次/分，P60次/分，全身发绀，四肢凉，皮襄加压给氧及胸外心脏按压时，口鼻腔流出血性泡沫液体。给予该患儿呼吸支持首选下列哪一项

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