ping网站只返回IPV6地址 | Only return IPV6 address when pinging website
现在越来越多的网站启用了IPV6访问，家里的IPV6也基本正常了。
Now more and more websites enable IPV6 access, and the IPV6 address is normal at home .
ping某些网站时只返回IPV6地址，比如网易的：www.163.com
Only return IPV6 address when pinging some websites, such as Netease:www.163.com
如果需要返回ipv4地址，只需要在后面加上 '-4'的参数，即可
If you need to return the ipv4 address, just add the '-4' parameter after the command.
