ACE and angina pectoris: CT (rest on bed, low-salt diet, low-flow oxygen inhalation, etc. nifedipine tablets, 10 mg, Tid; aspirin enteric-coated tablets 112 mg, Qd; angiotensin converting enzyme inhibitor benazepril 5 mg, Qd; trimetazidine, 20 mg, Tid; isosorbide dinitrate tablets 10 mg, Tid; take isosorbide dinitrate tablets when angina pectoris attacks, 10 mg/time)