casuistics

例句：

1. 1.The psychologist's research has shed light on the causative factors of mental illness.
   这位心理学家的研究揭示了导致精神疾病的原因。
2. 2.The study found that the cause of the disease was due to environmental pollution.
   研究发现，这种疾病的原因是环境污染。
3. 3. The doctor advised the patient to avoid certain foods that could be a cause of his condition.
   医生建议病人避免某些可能导致他病情的食物。