( ) working as a doctor,he also writes novels in his spare (

Besides 除.之外（还有）
全句意思是“他除了做医生工作之外,在业余时间他还写小说.”
beside在.旁边
Except 除去.
we go to school every day except Saturday and Sunday.除了周六周日以外,我们每天都去上学.