The following is a traffic slogan: A drop of wine for the driver, a thousand tears for the relatives. Please tell me its subtleties.

First, it vividly describes the dangers of driving under the influence of alcohol.

Second, the language is concise, easy to understand, catchy to read, and easy to remember. People have a photographic memory, which is very suitable for use as promotional slogans.

Third, the dialogue is neat. The driver is to his relatives, a drop is to a thousand lines, and wine is to tears. It meets the requirements of our couplets.