造成血细胞目视计数固有误差的原因是() ["A．使用器材不符合要求","B．稀释倍数不准","C．采血部位不当","D．充池后细胞在计数室内分布不可能完全相同","E．血液发生凝固"]
改良Neubauer计数板的两侧支柱比计数室高出() ["A．0.01mm","B．0.10mm","C．0.05mm","D．0.5mm","E．1.0mm"]
供血细胞分析仪进行细胞计数时，血液标本应保存在() ["A．4℃","B．-20℃","C．-70℃","D．室温","E．37℃"]
关于耳垂采血的叙述，正确的是() ["A．可获得较多血量","B．适合婴幼儿","C．检查结果恒定","D．与静脉血差异小","E．痛感较轻"]
下肢静脉曲张10年，劳累后肢体肿胀，皮炎及溃疡经久不愈，应行() ["A．弹性绷带包扎治疗","B．抗感染治疗","C．物理治疗","D．局部药物治疗","E．手术治疗"]
背景:
