string(237) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E5%AE%89%E6%8A%80%E6%9C%AF%E9%A2%98%E5%9E%8B%E5%88%86%E5%B8%83 => Failed to connect to 14.18.46.51 port 38206: Connection refused"
注安技术题型分布
