string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%84%B8%E8%B0%B1%E9%A2%9C%E8%89%B2%E8%A1%A8%E7%A4%BA%E7%9A%84%E5%90%AB%E4%B9%89 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
脸谱颜色表示的含义
