string(304) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%83%BD%E5%8A%9B%E6%9C%AC%E9%A2%86%E4%B8%8D%E5%BC%BA%2C%E4%BD%9C%E7%94%A8%E5%8F%91%E6%8C%A5%E4%B8%8D%E5%A4%9F%E7%9A%84%E5%8E%9F%E5%9B%A0 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
能力本领不强,作用发挥不够的原因
