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/python/chapter_array_and_linkedlist/list.py

@@ -22,7 +22,7 @@ if __name__ == "__main__":
     nums.clear()
     print("\n清空列表后 nums =", nums)
 
-    # 尾部添加元素
+    # 在尾部添加元素
     nums.append(1)
     nums.append(3)
     nums.append(2)
@@ -30,7 +30,7 @@ if __name__ == "__main__":
     nums.append(4)
     print("\n添加元素后 nums =", nums)
 
-    # 中间插入元素
+    # 在中间插入元素
     nums.insert(3, 6)
     print("\n在索引 3 处插入数字 6 ，得到 nums =", nums)