Reference answer: subject and object ask and answer, restrain the object and extend the subject. How dull it would be if all the contents contained in this paragraph were direct discussion and lyricism instead of this special question-and-answer form! With this form, the situation of literature will be choppy, ups and downs, turning stagnation into life, turning plain into light, and advancing through questions and answers. The so-called "easy to lift weights" and "eloquent" styles are all displayed in the form of questions and answers between the host and the guest.