to the letter
完全按照字面意思；毫不偏離；完全按照規定或要求
口語·強調嚴格遵循
英文釋義
to follow something exactly or precisely; to adhere strictly to instructions or rules
例句
Follow the recipe to the letter, or the cake won't turn out right.
典故來源
源自法律或書面指令，強調逐字逐句地執行，不偏離原意。