string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%BB%BA%E6%A1%88%E4%BE%8B%E8%80%83%E8%AF%95%E7%94%A8%E4%B8%8D%E7%94%A8%E5%86%99%E7%AD%94 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
一建案例考试用不用写答
