uniform reflections of tree.json

data/tree.json

@@ -9,7 +9,7 @@
           "keywords": [],
           "children": [
             {
-              "PostgreSQL基本概念": {
+              "基本概念": {
                 "node_id": "pg-1aad17890736469a8b2f61a36dfe41db",
                 "keywords": [],
                 "children": [
@@ -41,12 +41,12 @@
               }
             },
             {
-              "PostgreSQL的安装": {
+              "安装和使用": {
                 "node_id": "pg-d95edf2d942b45d781e112be785ce260",
                 "keywords": [],
                 "children": [
                   {
-                    "安装PostgreSQL": {
+                    "安装": {
                       "node_id": "pg-940afa6d71af44f689011ded8fd91a98",
                       "keywords": [
                         "安装",
@@ -56,7 +56,7 @@
                     }
                   },
                   {
-                    "登录PostgreSQL": {
+                    "登录": {
                       "node_id": "pg-586916fe52e245efb399ae862378f87f",
                       "keywords": [
                         "登录",
@@ -67,7 +67,7 @@
                     }
                   },
                   {
-                    "使用PostgreSQL": {
+                    "使用": {
                       "node_id": "pg-c252ff4b0e7f4163837c9b6f81678505",
                       "keywords": [
                         "login",
@@ -129,7 +129,7 @@
           "keywords": [],
           "children": [
             {
-              "PostgreSQL数据库的基本结构": {
+              "基本结构": {
                 "node_id": "pg-100e256ddb2e43ea8d68558e73522819",
                 "keywords": [],
                 "children": [