题目：
样本采集选择时间的最佳原则中，不正确的是（）
A.症状最稳定的时间
B.最具有代表性的时间
C.检出阳性率最高的时间
D.诊断最有价值的时间
E.以清晨空腹为佳
答案：
参考答案：A
解析：样本采集时间要根据血循环中分析物水平的变化而定，保证每天样本采集时间恒定对于消除由日内变异造成的影响很重要。选择最佳采集时间的目的是为了提高检出的阳性率。症状最稳定的时间，可能是疾病的病理生理表现较不具有特性的时段，因而此时选择采集样本是不明智的。
样本采集选择时间的最佳原则中，不正确的是（） A.症状最稳定的时间 B.最具有代表性
来源：www.tikuol.com
题型：单项选择题 A1/A2型题
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