这些血液检查用于诊断目的。

These blood tests are for ___diagnostic purposes.

咳嗽和发烧是这种疾病的常见诊断特征。

Cough and fever are common ___diagnostic features of this disease.

这些测试结果对诊断问题的根源非常有效。

The test results were highly ___diagnostic in identifying the root cause of the problem.