晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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   <title>LST - Cursor On Cursor - Add C</title>
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<center><b><font face="Arial,Helvetica"><font size=+1>LST</font></font></b>
<br><b><font face="Arial,Helvetica"><font size=+1>Cursor On Cursor</font></font></b>
<br><b><font face="Arial,Helvetica"><font size=+1>Add C</font></font></b>
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<b><font face="Arial,Helvetica">Description</font></b>
<p><font face="Arial,Helvetica">This diagram depicts a cursor (C) which
is based upon another cursor (B). It shows how a list can be incrementally
reduced using calls to lstOpenCursor() with a filter function.</font>
<p><font face="Arial,Helvetica">Notice that the item (C1) is a direct reference
to the root list (A) even though the cursor is based upon (B).</font>
<p><b><font face="Arial,Helvetica">Symantics</font></b>
<p><font face="Arial,Helvetica">(B) and (C) are cursors.</font>
<p><font face="Arial,Helvetica">(C) is based upon (B).</font>
<p><font face="Arial,Helvetica">(B) is the base list for (C).</font>
<p><font face="Arial,Helvetica">(A) is the root list for (B) and (C).</font>
<p><font face="Arial,Helvetica">(A) is the base list for (B).</font>
<p><b><font face="Arial,Helvetica">Related Functions</font></b>
<p><font face="Arial,Helvetica">lstOpenCursor()</font>
<p>
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