over-fastidious       
adjective (also overfastidious) uk/ˌəʊ.və.fæsˈtɪd.i.əs/ us/ˌoʊ.vɚ.fæsˈtɪd.i.əs/
 过分挑剔
giving too much attention to small details and wanting everything to be more correct than is necessary or helpful
  He is critical of others, over-fastidious, and likes to be in charge of everything. 他严于责人,吹毛求疵,喜欢包揽一切。 
 Her pronunciation is careful and exact, and sometimes sounds overfastidious.
 - More examples
 - He calls me over-fastidious because I won't even have one drink before driving.
 - With her students she is over-fastidious and demanding, and criticizes much of the work they produce.
 - An over-fastidious volunteer had corrected the spelling on the sign.