referral

referral
noun
  1. an act of referring someone or something for consultation, review, or further action
    参照,查阅
    ■[mass noun]the directing of a patient to a medical specialist by a general physician
    (向专科医生的)转诊介绍
    ■a person whose case has been referred to a specialist doctor or a professional body
    (转给专科医生或专科医院的)转诊病人
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