string(286) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%9F%E4%BA%A7%E8%83%BD%E5%8A%9B%E6%8C%87%E6%95%B0%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E8%83%BD%E5%A4%A7%E4%BA%8E1 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
生产能力指数为什么不能大于1
