string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=crm%E7%9A%84%E4%B8%89%E4%B8%AA%E7%BB%84%E6%88%90%E9%83%A8%E5%88%86 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
crm的三个组成部分
