string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%85%89%E4%BC%8F%E5%8F%91%E7%94%B5%E5%B1%8B%E9%A1%B6%E6%9C%89%E8%BE%90%E5%B0%84%E5%90%97%E5%AE%89%E5%85%A8%E5%90%97 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
光伏发电屋顶有辐射吗安全吗
