【单选题】【消耗次数：1】
下列哪种情况下考虑开始康复：
①
吸入氧浓度≤60%，呼气末正压
②
呼气末正压通气
③
对刺激保持反应
④
无直立性低血压或无需泵入血管活性药物
⑤
患者撤机72小时后
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