docs: 更新README.md，添加长回复使用方法

README.en.md

@@ -304,6 +304,10 @@ Q: Why doesn't the frontend have a typewriter effect?
 
 A: One possible reason is that after Nginx reverse proxying, buffering is turned on, and Nginx will try to buffer a certain amount of data from the backend before sending it to the browser. Please try adding `proxy_buffering off;` after the reverse proxy parameter and then reloading Nginx. Other web server configurations are similar.
 
+Q: The content returned is incomplete?
+
+A: There is a length limit for the content returned by the API each time. You can modify the `VITE_GLOB_OPEN_LONG_REPLY` field in the `.env` file under the root directory, set it to `true`, and rebuild the front-end to enable the long reply feature, which can return the full content. It should be noted that using this feature may bring more API usage fees.
+
 ## Contributing
 
 Please read the [Contributing Guidelines](./CONTRIBUTING.en.md) before contributing.

README.md

@@ -310,6 +310,10 @@ Q: 前端没有打字机效果？
 
 A: 一种可能原因是经过 Nginx 反向代理，开启了 buffer，则 Nginx 会尝试从后端缓冲一定大小的数据再发送给浏览器。请尝试在反代参数后添加 `proxy_buffering off;`，然后重载 Nginx。其他 web server 配置同理。
 
+Q: 内容返回不完整？
+
+A: 接口每次返回的内容是有长度限制的，可以修改根目录下`.env`文件中的`VITE_GLOB_OPEN_LONG_REPLY`字段，将其设置为`true`，重新编译前端即可开启长回复功能，即可返回全部的内容。需要注意的是，使用此功能可能带来较多的API使用费用。
+
 ## 参与贡献
 
 贡献之前请先阅读 [贡献指南](./CONTRIBUTING.md)