string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8D%96%E6%B2%B9%E7%BF%81%E5%B0%94%E6%9C%89%E4%BB%80%E4%B9%88%E7%94%A8%E6%B3%95 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
卖油翁尔有什么用法
