update readme

README.md

@@ -128,10 +128,8 @@ python check_proxy.py
 
 ### 图片显示：
 <div align="center">
-<img src="https://user-images.githubusercontent.com/96192199/226906087-b5f1c127-2060-4db9-af05-487643b21ed9.png" width="500" >
-</div>
-<div align="center">
-<img src="https://user-images.githubusercontent.com/96192199/226906703-7226495d-6a1f-4a53-9728-ce6778cbdd19.png" width="200" >
+<img src="https://user-images.githubusercontent.com/96192199/226906087-b5f1c127-2060-4db9-af05-487643b21ed9.png" height="200" >
+<img src="https://user-images.githubusercontent.com/96192199/226906703-7226495d-6a1f-4a53-9728-ce6778cbdd19.png" height="200" >
 </div>
 
 ### 如果一个程序能够读懂并剖析自己：
@@ -165,7 +163,7 @@ python check_proxy.py
 <img src="https://user-images.githubusercontent.com/96192199/227504005-efeaefe0-b687-49d0-bf95-2d7b7e66c348.png" height="300" >
 </div>
 
-## 模块化功能设计
+### 模块化功能设计
 <div align="center">
 <img src="https://user-images.githubusercontent.com/96192199/227504981-4c6c39c0-ae79-47e6-bffe-0e6442d9da65.png" height="400" >
 <img src="https://user-images.githubusercontent.com/96192199/227504931-19955f78-45cd-4d1c-adac-e71e50957915.png" height="400" >