求解线索二叉树中结点前趋和后继的算法以及以相应次序遍历线索二叉树的算法，二叉树的线索化算法的设计-Solving clues to binary tree node before the trend and follow-up algorithm and the corresponding sequence of binary tree traversal algorithm clues, clues to binary tree algorithm design
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001408s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.092996s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001260s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001927s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001229s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005803s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001751s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005836s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.020114s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001487s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 206413 [ RunTime:0.001337s ]
