A . A.胎儿娩出后24h内阴道流血量大于500mlB . 胎盘娩出后2~4h内阴道流血量大于500mlC . 胎盘娩出后24h内阴道流血量大于500mlD . 胎儿娩出后2~4h内阴道流血量大于500mlE . 胎儿娩出后1周内阴道流血量大于500ml
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