string(311) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E6%A0%B7%E6%94%B6%E9%9B%86%E6%95%B0%E6%8D%AE%E6%97%A0%E9%81%97%E6%BC%8F%E6%97%A0%E9%87%8D%E5%A4%8D%E7%9A%84%E6%95%B0%E6%8D%AE%E5%91%A2 => Failed to connect to 101.91.112.32 port 38195: Connection refused"
怎样收集数据无遗漏无重复的数据呢
