referral
/rɪˈfɜːrəl/noun
1- an act of referring someone or something for consultation, review, or further action参照, 查阅。
1.1
- 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。
1.2
- 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。