He owes me 50 yuan.Jack is seeing a doctor. JACK是病人 / Jack is seeing a patient. JACK是医生以下供参考:(医生治病) see a patient;treat;attend;give medical advice这位老医生看病很仔细。The old doctor handles his cases with great care.(病人就医) see a doctor;consult a doctor;go to a doctor今天下午我去 看病。I'm going to see a doctor this afternoon.