observant

adjective

paying close attention especially to details
細部に周到な注意を特に払う
(of individuals) adhering strictly to laws and rules and customs
（個人について）厳密に、法、規則、および習慣を固く守る
- law-abiding citizens
  法律を守る市民
- observant of the speed limit
  速度制限を遵守する
quick to notice
気づくのが速い

showing quick and keen perception
迅速で鋭い認識を示すこと

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