string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BC%80%E4%B8%AA%E4%B9%A6%E5%BA%97%E9%9C%80%E8%A6%81%E6%8A%95%E8%B5%84%E5%A4%9A%E5%B0%91%E9%92%B1%E5%91%A2%E7%9F%A5%E4%B9%8E => Failed to connect to 101.89.117.144 port 38017: Connection refused"
开个书店需要投资多少钱呢知乎
