【单选题】【消耗次数：1】
下列各项中明确表明上消化道大出血尚未停止的不包括
①
黑便次数增多伴肠鸣音亢进
②
网织红细胞计数持续增高
③
黑便由糊状变为成形略带黄色
④
呕吐物由咖啡色转为鲜红色
⑤
血尿素氮恢复正常后又升高
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