purist
noun [ C ] uk/ˈpjʊə.rɪst/ us/ˈpjʊr.ɪst/
正统主义者；力求纯正者；纯粹主义者
someone who believes in and follows very traditional rules or ideas in a subject
Although purists may object to split infinitives, like "to boldly go", the fact is, they are commonly used. 尽管讲究语言规范的人会反对分离不定式，比如 to boldly go，可事实是这种用法很普遍。
Purists eat smoked salmon with nothing more than lemon and black pepper. 讲究口味纯正的人吃熏鲑鱼时除了柠檬和黑胡椒什么也不加。