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【多选题】
下列关于非药物的分娩镇痛方法，不正确的是A.
非药物性的镇痛方法，简单安全没有副作用，是分娩镇痛的首选措施
B.
非药物性的镇痛包括了自由体位待产、分娩
C.
非药物性的镇痛应该被禁止
D.
只有 30 岁以下的孕妇才可以进行非药物性的镇痛
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