{\rtf1
\pard\plain
{AAA}
\par \sect\sectd\cols2\linebetcol\colsx0\ltrsect\sbknone\pard\plain
{\rtlch \ltrch\loch
Section 1, first column, this has a separator.}
\par \pard\plain
{Section 1, second column.}
\par \sect\sectd\sbknone\pard\plain
{BBB}
\par \sect\sectd\cols2\colsx0\ltrsect\sbknone\pard\plain
{Section 2, first column, this has no separator.}
\par \pard\plain
{Section 2, second column.}
\par \sect\sectd\sbknone\pard\plain
{CCC}
\par }