string(292) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A4%96%E8%84%9A%E6%89%8B%E6%9E%B6%E6%AF%8F%E5%B1%82%E9%9C%80%E8%A6%81%E9%93%BA%E8%AE%BE%E8%84%9A%E6%89%8B%E6%9D%BF%E5%90%97 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
外脚手架每层需要铺设脚手板吗
