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%9C%BA%E7%94%B5%E5%AD%A6%E5%88%B0%E5%95%A5%E7%A8%8B%E5%BA%A6%E5%8F%AF%E8%BF%87 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
一建机电学到啥程度可过
