doctor 普通用词，泛指各科医生，即一切有行医资格的人。
physician 指医院的内科医生。
surgeon 指专修外科或专修人体某个部分的外科专科医生，这种医生一般需对患者进行手术治疗。
dentist 指专门从事治牙的医生。
参考例句
1. He doctored her back to health. 他给她治好病，使她康复。
2. His wish is to become a doctor. 他的愿望是想成为一名医生。
3. Is she a doctor or a worker? 她是一个医生还是一个工人？
英英解释
n.
1. a licensed medical practitioner
2. (Roman Catholic Church) a title conferred on 33 saints who distinguished themselves through the orth
3. children take the roles of physician or patient or nurse and pretend they are at the physician's off
4. a person who holds Ph.D. degree (or the equivalent) from an academic institution v.
1. alter and make impure, as with the intention to deceive
2. give medical treatment to
3. restore by replacing a part or putting together what is torn or broken
网络释义
doctor 博士;
医师;
医师，博士;
印花刮刀;
mad doctor 精神病科医生（不是“发疯的医生”）;
精神病科医生(不是“发疯的医生”);
精神病科医生（不是"发疯的医生"）;
精神病科医生 （不是“发疯的医生”）;
