string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%A9%BA%E8%B0%83%E6%B8%A9%E5%BA%A6%E5%A4%9A%E5%B0%91%E5%BA%A6%E4%BB%A5%E4%B8%8A%E6%9C%80%E7%9C%81%E7%94%B5 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
空调温度多少度以上最省电
