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【多选题】
血沉测定的影响因素有哪些？（）A.
温度：室温太低，血沉减慢，反之加快
B.
血沉管的倾斜度：测定时血沉管必须直立，垂直固定好
C.
抗凝剂：抗凝剂与血液的比例力求准确，血沉减慢，过多则加速？
D.
血沉管内径大小：一般不小于2毫米，否则减慢
E.
血液放置时间不超过2小时，否则减慢
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