發現子目錄與根目錄不同的地方是訪問地址后面有沒有加斜杠所請求的地址有一點點不同，下面是規則：

RewriteBase /news
RewriteCond %{HTTP_HOST} ^zui88.com [NC]
RewriteRule com(.*)$ http://www.18av-77.com$1 [L,R=301]
#不加斜杠請求的地址是/wwwroot/zui88.com/news/
RewriteCond %{HTTP_HOST} ^zui88.com [NC]
RewriteRule (.*)$ http://www.18av-77.com/news/$1 [L,R=301]

RewriteCond %{HTTP_HOST} ^124.173.133.154 [NC]
RewriteRule com(.*)$ http://www.18av-77.com$1 [L,R=301]

RewriteCond %{HTTP_HOST} ^124.173.133.154 [NC]
RewriteRule (.*)$ http://www.18av-77.com/news/$1 [L,R=301]