string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%85%B3%E4%BA%8E%E5%87%80%E5%88%A9%E6%B6%A6%E7%9A%84%E8%AE%A1%E7%AE%97%E5%8F%8A%E5%88%86%E5%BD%95 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
关于净利润的计算及分录
