采集国家食品药品监督局的OTC中药数据

网址构造：

http://app1.sfda.gov.cn/datasearchcnda/face3/search.jsp?tableId=2&State=1&bcId=154117774864483786665867801676&State=1&curstart=4&State=1&tableName=TABLE2&State=1&viewtitleName=COLUMN5&State=1&tableView=OTC%25E4%25B8%25AD%25E8%258D%25AF%25E8%25AF%25B4%25E6%2598%258E%25E4%25B9%25A6%25E8%258C%2583%25E6%259C%25AC&State=1&cid=0&State=1&ytableId=0&State=1&searchType=search&State=1

其中curstart为翻页参数