string(251) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B5%E8%84%91%E6%98%BE%E7%A4%BA%E5%99%A81k%E5%92%8C2k%E7%9A%84%E5%8C%BA%E5%88%AB => Failed to connect to 14.18.117.71 port 38041: Connection refused"
电脑显示器1k和2k的区别
