string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%A0%87%E5%87%86%E7%9A%84%E6%8A%A5%E4%BB%B7%E5%8D%95%E6%A0%BC%E5%BC%8F => Failed to connect to 101.89.143.195 port 38205: Connection refused"
标准的报价单格式
