说明：  在World Data Center for Geomagnetism, Kyoto（世界地磁数据中心）网站爬取指定时间段的DST磁情指数数据，并存储为excel（.csv）数据格式
(In the world data center for Geomagnetism, Kyoto website, the DST magnetic situation index data in a specified period of time is crawled and stored in Excel (. CSV) data format)