string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%BB%84%E9%87%91%E5%8F%AA%E6%A0%87%E6%B3%A8%E4%BA%86%E8%B6%B3%E9%87%91%E4%BA%8C%E5%AD%97 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
黄金只标注了足金二字
