string(252) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%BA%E4%BB%80%E4%B9%88%E9%80%89%E6%8B%A9idc%E8%BF%99%E4%B8%AA%E8%A1%8C%E4%B8%9A => Failed to connect to 101.89.117.144 port 38208: Connection refused"
为什么选择idc这个行业
