有没有哪个包可以用来为多列显示不同的内容，并在它们之间自由切换？例如，
\begin{column1}
column 1 text ...
\end{column1}
\begin{column2}
column 2 text ... (more than a page)
\end{column2}
\begin{column1}
column 1 text conti...
\end{column1}
\begin{column2}
column 2 text conti...
\end{column2}
\begin{column1}
column 1 text contii...
\end{column1}
哪个输出
-(page 1)-
column 1 text | column 2 text
column 1 text conti... | ...
column 1 text contii... | ...
-(page 2)-
| ...
| column 2 text conti...