1. 1. The content conforms to the article and the theme is clear and prominent. The contrast between snow and warmth emphasizes the simplicity and kindness of those who silently help others without asking for anything in return, as well as the heartfelt gratitude of those who are helped.

Secondly, using figurative rhetoric, the city in the dark is compared to a desert island, which highlights the inner terror and emphasizes the great comfort that that light brings to her.

Third, refers to the appearance of water, indicating that the heart is desolate and eager for warmth.

Fourth, do not ask for anything in return, be sincere and simple, and be ready to help others.