如何转发为GET请求输入的查询参数，例如：

http://example.com?lang=en&id=23

运行在其他端口上的服务器？我添加了一个虚拟主机，如下所示：

    <VirtualHost *:80>
        # The ServerName directive sets the request scheme,hostname and port that
        # the server uses to identify itself. This is used when creating
        # redirection URLs. In the context of virtual hosts,the ServerName
        # specifies what hostname must appear in the request's Host: header to
        # match this virtual host. For the default virtual host (this file) this
        # value is not decisive as it is used as a last resort host regardless.
        # However,you must set it for any further virtual host explicitly.
        #ServerName www.example.com

        ServerAdmin webmaster@hi.avt2.com
        ServerName example.com
        ServerAlias example.com
        ProxyPass / http://localhost:3001/           
        ProxyPassReverse / http://localhost:3001/


        # Available loglevels: trace8,...,trace1,debug,info,notice,warn,# error,crit,alert,emerg.
        # It is also possible to configure the loglevel for particular
        # modules,e.g.
        #LogLevel info ssl:warn

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        # For most configuration files from conf-available/,which are
        # enabled or disabled at a global level,it is possible to
        # include a line for only one particular virtual host. For example the
        # following line enables the CGI configuration for this host only
        # after it has been globally disabled with "a2disconf".
        #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

它将在/处发生的所有请求转发到运行在端口3000上的本地服务器。现在，我还想转发用户在浏览器/ HTTP客户端中输入的查询参数。我该怎么办？