stick·ler /ˈstɪk(ə)lɚ/
 好挑剔的人;拘泥的人
 Stic·kler n.  One who stickles. Specifically: --
 (a) One who arbitrates a duel; a sidesman to a fencer; a second; an umpire. [Obs.]
    Basilius, the judge, appointed sticklers and trumpets whom the others should obey.   --Sir P. Sidney.
 Our former chiefs, like sticklers of the war,
 First sought to inflame the parties, then to poise.   --Dryden.
 (b) One who pertinaciously contends for some trifling things, as a point of etiquette; an unreasonable, obstinate contender; as, a stickler for ceremony.
    The Tory or High-church were the greatest sticklers against the exorbitant proceedings of King James II.   --Swift.
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 stickler
      n : someone who insists on something; "a stickler for
          promptness"