She recovered quickly after surgery and returned to work within a week.

recovered 是动词 recover 的过去式，recover 由前缀 re-（表示"重新"）和 cover（覆盖）组成，字面意思是"重新覆盖"，引申为"恢复、康复"，指从疾病或手术中恢复到健康状态。