perfectionist
noun [ C ] uk/pəˈfek.ʃən.ɪst/ us/pɚˈfek.ʃən.ɪst/
至善论者；完美主义者
a person who wants everything to be perfect and demands the highest standards possible
She's such a perfectionist that she notices even the tiniest mistakes. 她是个完美主义者，连极小的错误都能注意到。