string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cpa%E5%88%B0%E5%BA%95%E6%9C%89%E5%A4%9A%E5%A4%A7%E4%BD%9C%E7%94%A8 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
cpa到底有多大作用
