DEAR HARRIETTE: A woman at my job has been giving me hell. She works nonstop. She’s often sending emails at 9 p.m. or 4 a.m. – and she actually expects a response! Recently she chewed out one of my colleagues because she requested something at 6 a.m. and didn’t hear back until 8 a.m., which is still outside of our normal business hours. It may come as no surprise but, yes, she is single and a bit …