string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B1%8B%E9%A1%B6%E5%85%89%E4%BC%8F%E5%8F%91%E7%94%B5%E5%AF%B9%E4%BA%BA%E4%BD%93%E6%9C%89%E8%BE%90%E5%B0%84%E5%90%97 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
屋顶光伏发电对人体有辐射吗
