observant

善于观察的；机警的；严格遵守的英释中释adjgood or quick at noticing things

1 a quiet and observant person.一个寡言而机敏的人

2 Supervisors are trained to be observant..主管被训练得敏锐机警。

3 the writer’s observant eye for detail.这位作家善于捕捉细节的敏锐目光