エントリーファイルがある場合とない場合で、ci の URL にこれほど大きな違いがあるのはなぜですか?

	server {        listen       80;        server_name  aa.baidu.dd;		index index.php;		client_max_body_size 5M;		client_body_buffer_size 128k;		        charset utf-8;        location / {            root   /var/www/baidu/wx;            index  index.php;			if (!-e $request_filename)			{				rewrite  ^/(.*)$  /index.php/$1  last;				break;			}        }        error_page  404              /404.html;        error_page   500 502 503 504  /50x.html;        location = /50x.html {            root   html;        }				location ~ .+\.php($|/){			set $script    $uri;			set $path_info  "/";			if ($uri ~ "^(.+\.php)(/.+)")			{				set $script     $1;				set $path_info  $2;			}            fastcgi_pass   127.0.0.1:9000;            fastcgi_index  index.php;            fastcgi_param  SCRIPT_FILENAME  /var/www/baidu/wx$fastcgi_script_name;            include        fastcgi_params;        }    }