若在点处连续且，则对于的某一邻域，当时，下列关于的说法中正确的是.
Dear Helen,
I'm on the farm in America now. Every day it's sunny and warm. There are a lot of children on the farm. I work and play games with them. Now I'm writing the letter in the house. Jack is learning to swim. Terry is lying (躺) in the sun. John is reading a newspaper and some children are playing football near the house. We are going to milk cows tomorrow, so we have to get up earlier tomorrow morning.
We enjoy (享受) the holiday very much.
See you soon.
Love,
Janet