Very patiently. as a kid who was also scared/nervous and a kid who had/has separation anxiety and anxiety, I can say for certain its a huge spectrum and such. As a kid who was treated with anything but patience, I can say that that's what children really need. they would react in an understanding and patient manner it might take awhile for children to get use to the daycare and stop crying at the entrance but in due time I think they would work on a close bond with the child making sure they felt safe enough to proceed without fear. They are probably rather used to scared/nervous children, and for the first, however long the child would need, they would be pared up with an attendant of their choice until they felt comfortable without someone to comfort them. I don't think children's separation anxiety/anxiety in whole is taken seriously enough. Children may just be "overeacting," but that doesn't make their overwhelming and scary situation invalid, and the way young children with actual anxiety / other shouldn't be lectured they are mistreated so often. They should be understood, but that's an entire other conversation, lol.