string(258) "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%E4%B9%A6%E4%B8%AD%E6%A1%88%E4%BE%8B%E9%A2%98%E6%9C%89%E7%94%A8%E5%90%97 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
一建书中案例题有用吗
