string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B7%A6%E7%BA%A2%E5%86%9B%E7%9A%84%E4%B8%80%E5%BB%BA%E7%BA%A2%E5%AE%9D%E4%B9%A6%E6%9C%89%E7%94%A8%E6%B2%A1 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
左红军的一建红宝书有用没
