1. Suddenly, a small head appeared on the water in the distance. Yulai shook the water on his head like a little duck, wiped his eyes and nose with his hands, blew in his mouth, and looked at his mother and smiled.

This passage follows closely from the previous paragraph "When the rain comes, it plunges into the river and disappears." The word "suddenly" indicates that one did not expect it. The "little head" not only sticks out far, but also looks cute. "Like a little duck" not only vividly expresses Yu Lai's swimming ability, but also expresses Yu Lai's naughty and lively nature. What a smart and cute boy he is!

2. The sun has set. The floating clouds in the blue sky are like pieces of red silk, reflected on the Returning Home River, like large cockscombs blooming. The reed flowers in the reed pond were blown up by the wind and fluttered leisurely on it.

This passage describes the evening scene on the Return Home River. The blue sky, the floating clouds like pieces of red silk, the Huanxiang River reflecting the floating clouds, and the fluttering reed flowers form a magnificent landscape. Compared with the atmosphere of the struggle between Yu Lai and the Japanese described above, this scene and environment seemed particularly peaceful, implying the sadness of Yu Lai's possible sacrifice.

3. "We are Chinese and we love our motherland."

This sentence is repeated three times in the article, which strengthens the loop of the novel and makes the theme of the article more distinct. , and truly reflects the process of Yu Lai's character formation and development.

4. "The blood dripped down and splashed on the lines of the textbook."

This sentence highlights Yu Lai's determination to defend his motherland and his determination to fight the enemy to the end. Strong will.