I've had the experience about five times recently when after I answer a question, the asker ends up nagging me with more questions in the comments. The most recently was just now: https://math.stackexchange.com/questions/4498892/exercise-14-section-2-c-linear-algebra-done-right/4498916?noredirect=1#comment9440764_4498916. I suspect that the person asking the question has not really made enough effort.

I can't be the only person who has experienced this.

What is the appropriate response to nagging questions like this? I usually tell them to ask another sitewide question as you can see above, but it's irritating enough to me when these endless followup questions start that several times I have considered just deleting the answer.