string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%92%E8%81%94%E7%BD%91%E7%9A%84%E5%B9%BF%E6%B3%9B%E8%BF%90%E7%94%A8 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
互联网的广泛运用
