diagnostics

例句：

1. 1.The doctor performed a diagnostic test to determine the cause of her illness.
   医生进行了一次诊断测试，以确定她的疾病原因。
2. 2.Diagnosing a disease early is crucial for effective treatment.
   早期诊断疾病对于有效治疗至关重要。
3. 3. Diagnoses based on symptoms alone are often inaccurate.
   仅凭症状进行的诊断往往不准确。