The founding brothers where I work used to have their own weekly call-in show on NPR where they learned the art of answering the caller’s question:

• Keep it brief,
• Answer the question and
• Move on.

Their reasoning was that whatever question a single individual brings to the table is typically relevant only to that person and a handful of others. Therefore, to avoid losing the majority of the group, you address their question, but not expand or pontificate, just answer it to the best of your ability and move on to the next question.