I'mon my way out to work, but I'll do the first now and try todo the others later.
1) From what has been discussed above, we may safely draw a conclusion that part-time job can produce a far-reaching impact on students and they should be encouraged to take part-time job, which will benefit students and their family, even the society as a whole.
This does not sound like a native speaker, but sounds like an advanced non-native. I'd say 'a part-time job', or make it plural. I'd rewrite is as follows:
1) From what has been discussed above, we may safely conclude that part-time jobs can have a far-reaching impact on students and they should be encouraged to take part-time jobs, which will benefit them and their families, and even society as a whole.
Does that sound better?![]()

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