string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9C%8B%E4%B8%80%E9%80%A0%E7%9A%84%E4%B9%A6%E8%80%83%E4%BA%8C%E9%80%A0 => Failed to connect to 218.78.59.96 port 38043: Connection refused"
看一造的书考二造
