defensive medicine
noun [uncountable] (especially North American English)medical treatment that may involve more tests, operations, etc. than a person really needs because a doctor is worried that a claim or complaint may be made against them in court if they make a mistake in the treatment they give 防御性医疗，自卫性医疗（医生担心因误诊被起诉而让病人做过多的化验、手术等）