他在大学里教授病理学，专注于研究疾病的成因。

He teaches ___pathology at the university, focusing on the causes of diseases.

医生通过显微镜观察组织样本，以确定疾病的病理变化。

The doctor examined the tissue sample under a microscope to identify the ___pathology of the disease.

她对完美的追求已经到了病态的程度。

Her pursuit of perfection has turned into ___pathology.