Test analysis: The poem in the stem comes from the story of "Six Feet Lane", which means that it is really worthwhile to write a book for the wall, so it doesn't matter if it is three feet. What if Qin Shihuang built the Great Wall in Wan Li? It means to persuade family members not to care too much about their neighbors, which embodies the spirit of tolerance. Therefore, B is correct.
Comments: This topic takes the story of Liuchi Lane, which is familiar to students, as the background material, examines the basic knowledge of the textbook and embodies the humanistic characteristics of ideological and moral character. Proverbs are vivid, easy to understand and easy for students to understand. It is not difficult to make a correct choice by grasping the key words of the material.