Do you talk with all people you meet on your way?  

If these are people you know, it would be very rude to just pass by and not at least acknowledge them.

Is it possible your daughter is jealous and thinks talking to these people is taking your attention away from her? Perhaps she is jealous of the fact that you know so many people and she knows so few?

well mostly no, I'm not a kind of person who is friendly, my life in online world and my life in real world are totally different. its totally opposite well I guess its because its easy to talk or communicate without facing some else.

I support you but thats the problem with teenaged youngsters.They are only your students or colleagues but your daughter is probably in her teen age hence this response.You are obviously a teacher or a professor who has the admiration of your students and they greet you.You are feeling awkward because you are unable to adequately respond to their greeting.If you can explain this to your daughter when you have her attention i'm sure she'll understand.But this requires tact which you have in abundance being a teacher.Just wait for the moment when she is amenable to your suggestion and talk it out with her.

I don't talk to people who I don't know. I will always talk to people who I know if I have the time, just as I would expect them to make the time to talk to me. I would look a bit silly talking to people I don't know very well.

It would surely be a little rude to ignore people that you knew though. Even if you just say hi, or smiled at them. I cannot stand the type of people who will put their heads down when they're walking past you just because they don't want to say hello to you.

hi,vel,I am a postgraduate in Agriculture,Genetics and Plant breeding,working as consultant Plant breeder[chilli].As i am interested in Jatropha plantations,i am working on this bidiesel crop also.

http://newjatrophaworld.com/

So i try to talk and had a small to big conversation to KNOW ABOUT THEIR INTEREST ON JATROPHA,which is my main job.