解决GitHub图片加载不出来或加载过慢的问题

解决办法：
打开路径C:\Windows\System32\drivers\etc下的hosts文件，在文件末尾添加：

# GitHub Start 
192.30.253.112    github.com 
192.30.253.119    gist.github.com
151.101.184.133    assets-cdn.github.com
151.101.184.133    raw.githubusercontent.com
151.101.184.133    gist.githubusercontent.com
151.101.184.133    cloud.githubusercontent.com
151.101.184.133    camo.githubusercontent.com
151.101.184.133    avatars0.githubusercontent.com
151.101.184.133    avatars1.githubusercontent.com
151.101.184.133    avatars2.githubusercontent.com
151.101.184.133    avatars3.githubusercontent.com
151.101.184.133    avatars4.githubusercontent.com
151.101.184.133    avatars5.githubusercontent.com
151.101.184.133    avatars6.githubusercontent.com
151.101.184.133    avatars7.githubusercontent.com
151.101.184.133    avatars8.githubusercontent.com

 # GitHub End

然后保存
如果在保存时出现禁止访问，权限不够，需要在右键单击hosts文件找到属性-安全-编辑，添加用户
然后在保存即可。