string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A2%9E%E5%BC%BA%E4%BD%93%E8%B4%A8%E7%9A%84%E6%9C%80%E5%A5%BD%E5%8A%9E%E6%B3%95%E6%98%AF%E4%BB%80%E4%B9%88 => Failed to connect to 101.89.159.206 port 38075: Connection refused"
增强体质的最好办法是什么
