女孩,8岁,因车祸伤脾破裂+肠破裂手术后第2天出现进行性呼吸困难,呼吸45〜50次/分,胸片两肺斑片影,PaO₂50mmHg,PaCO₂ 30mmHg。应立即给予哪项治疗
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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