string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BA%A2%E5%AE%9D%E4%B9%A6%E4%B8%80%E9%80%A0%E6%9C%89%E7%94%A8%E5%90%97 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
红宝书一造有用吗
