G'day yueli711,

Update: This approach has issues with some of the other data. See ++AnomalousMonk's feedback re these problems.

I believe applying this regex to each line will provide what you want.

s/\t(?=\t)/\t0/g
[download]

My test (just using the data from the first line you posted):

$ perl -le 'my $x = "1\t2\t\t\t2\t\t5\t\t\t\t4"; print $x; $x =~ s/\t(
+?=\t)/\t0/g; print $x'
1       2                       2               5                     
+          4
1       2       0       0       2       0       5       0       0     
+  0       4
[download]

Note: As you can see, my test used just tabs. The output lined up as shown above, both from my command line and when pasted into the textarea; however, the browser made a mess of it when rendered. I've actually changed all the output tabs to a series of spaces: what I've now posted is just a true representation of what the output looked like, not a verbatim copy of the actual output itself.