string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%9A%82%E8%9A%81%E6%A3%AE%E6%9E%97%E8%83%BD%E9%87%8F%E8%AE%A1%E7%AE%97%E5%85%AC%E5%BC%8F => Failed to connect to 14.18.117.71 port 38220: Connection refused"
蚂蚁森林能量计算公式
