"On the dot" nghĩa là gì?

Ví dụ

When figuring out whether or not you should leave work at 5pm on the dot, consider your workplace culture and how other employees go about it.

During our conversation, Galanis was exceedingly (cực kỳ) cordial (chân thành) and forthcoming (sẵn sàng giúp đỡ), but, at the half-hour mark, on the dot, he brought the call to an abrupt end. “I’ve got a hard stop, this was great, though—thank you,” he said suddenly, with no preamble (lời mở đầu), and hung up. A switch from hot to cold is par for the course (điển hình; thông thường) in interviews, which are necessarily transactional.

It seems like you not only need be on the dot, but also have refresh your page a few times to get one in your cart, and be mighty quick about typing in your payment info because you can still lose the preorder as you check out. Also, the Best Buy cart doesn’t seem to allow us to even begin check-out — a couple of Verge editors gave up after an hour, and one of us came back to find out it had been removed from our cart.