Knowledge points for CSV files:
1. full name: The Comma Separated Value (CSV) File Format
2. Default open hair: Excel
3. After opening the Sheet Name: CSV file name.
Note that when the following characters include the following characters in the CSV file name: []
4. CSV file format is separated by a series of cells with a western comma (ASCII) and uses Enter to implement the number of lines.
5. When the content in the cell contains a text comma, "" "is included. When the cell is included, "" instead "should be used.
Reference documentation:
http://www.creativyst.com/doc/articles/csv/csv01.htm
