string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B2%E8%99%8E%E7%BD%91%E7%9A%84%E4%B9%A6%E8%83%BD%E9%80%80%E5%90%97 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
甲虎网的书能退吗
