Data from log files

I have set long query time to 2 seconds in my cnf file.
Therefore all the queries taking more than 2 seconds are logged in the file called mysql-slow.log and the file size is 20 Mb.
Is there anyway to sort this file and find out the queries those are taking the most time so that I can optimize only those ones?
Here is how the file look like....

# Time: 080319 16:32:11
# User@Host: root[root] @ [192.29.0.134]
# Query_time: 5 Lock_time: 0 Rows_sent: 0 Rows_examined: 0
INSERT INTO queryLog SET id = '', filename = 'intermediate.php',queryLength = '72',exeTime = '0';
# Time: 080319 17:13:33
# User@Host: root[root] @ [192.29.3.143]
# Query_time: 9 Lock_time: 0 Rows_sent: 1 Rows_examined: 872116
select distinct(business_group) from d_jds.tbl_company_master limit 10;

grep -n Query_time mysql-slow.log | sort -k 3,3nr
7:# Query_time: 9 Lock_time: 0 Rows_sent: 1 Rows_examined: 872116
3:# Query_time: 5 Lock_time: 0 Rows_sent: 0 Rows_examined: 0

Then use the line numbers from grep to examine the longest running query
# sed -n '7,/;$/p' mysql-slow.log
# Query_time: 9 Lock_time: 0 Rows_sent: 1 Rows_examined: 872116
select distinct(business_group) from d_jds.tbl_company_master limit 10;