feat: Revised the book (#978)

* Sync recent changes to the revised Word.

* Revised the preface chapter

* Revised the introduction chapter

* Revised the computation complexity chapter

* Revised the chapter data structure

* Revised the chapter array and linked list

* Revised the chapter stack and queue

* Revised the chapter hashing

* Revised the chapter tree

* Revised the chapter heap

* Revised the chapter graph

* Revised the chapter searching

* Reivised the sorting chapter

* Revised the divide and conquer chapter

* Revised the chapter backtacking

* Revised the DP chapter

* Revised the greedy chapter

* Revised the appendix chapter

* Revised the preface chapter doubly

* Revised the figures

codes/javascript/chapter_tree/array_binary_tree.js

@@ -40,7 +40,7 @@ class ArrayBinaryTree {
 
     /* 获取索引为 i 节点的父节点的索引 */
     parent(i) {
-        return Math.floor((i - 1) / 2); // 向下取整
+        return Math.floor((i - 1) / 2); // 向下整除
     }
 
     /* 层序遍历 */