说明：  这个项目简洁、通俗地解释了有关平衡二叉树的问题。也提供了源代码和一个供演示的通用类。描述/提供了如何平衡二叉树的功能。
(the project concise and simple explanation of the balanced binary tree problem. Also provided source code and a demonstration for the general category. Description/how to provide balanced binary tree functions.)