The title of the poem is the stone moat official. What is written in detail in the text is that the old woman writes slightly about the small grain. Why is this?

Foreword "The Stone Corruptor" is one of the famous \ "Three Officials and Three Farewells \" by Du Fu, a great poet in the Tang Dynasty. Genre: Classical Poetry. This five-character ancient poem exposes the cruelty of feudal rulers through the story that the author saw with his own eyes, reflects the profound disaster brought to the people by the war caused by the \ "An Shi Rebellion \" in the Tang Dynasty, and expresses the poet's deep sympathy for the working people. This poem is in art. Love and hate are distinct. Scenes and details are natural and true. They are good at cutting and the center is prominent. The poetic style is clear, smooth, tragic and gloomy. It is a model of realistic literature. Shihao Li Author: Du Fu (Tang Dynasty) threw himself into Shihao Village at dusk, and officials caught people at night. The old man went over the wall and the old woman went out to watch. Why did the officials cry? After listening to the wife's speech, three men guarded Yecheng. There's no one in the room, only a grandchild. The grandchild hasn't gone, and there's no end to the skirt. Although the old woman's strength is weak, please come back from the official night. I have to prepare for the morning meal urgently. I can't speak for a long time at night, like crying and choking. I hope I can help you! Your adoption is the motivation for my answer! thank you