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维生素K缺乏所致出血性疾病在新生儿早期称为新生儿出血症,在生后2周～1岁的婴儿发病称为晚发性维生素K缺乏症。
Hemorrhagic disease caused by vitamin K deficiency is called neonatal hemorrhagic disease in the early neonatal period, and the onset of infantile 2 weeks to 1 year old is called late onset vitamin K deficiency.