get to the heart of the problem; see clearly the crux of the matter; see clearly where the vital point lies
❍ 只有善于思考的人，才能～。Only those who are good at thinking can see clearly where the vital point lies.
洞见症结dònɡ jiàn zhēnɡ jié
比喻观察敏锐，看到了问题的关键。find out of the origin of a disease, see clearly the crux of the matter, get to the heart of the problem