标题：用来检测结核分支杆菌传染病的诊断的两种商业化验血的日常临床实践：一种前瞻性研究。
Title: Use in routine clinical practice of two commercial blood tests for diagnosis of infection with Mycobacterium tuberculosis: a prospective study.
至于验微量元素，我建议你验血，因为头发会有灰尘或头垢而影响化验结果的。
As for postmortem trace elements , I suggest you a blood test because the hair will be dust or dirt and the impact of the first test result.
但化验血型并不是验血的唯一原因。
But blood typing isn't the only reason to have a blood test taken.
初期，患者无明显的自觉症状，只是化验血液时表现为血红蛋白低于正常值。
Initially, patients with no obvious symptoms, but blood tests showed lower than normal hemoglobin.
初期，患者无明显的自觉症状，只是化验血液时表现为血红蛋白低于正常值。
Initially, patients with no obvious symptoms, but blood tests showed lower than normal hemoglobin.
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