Secondly, the questions that can be answered must be answered clearly. If you are not sure about the answer, don't fool the child.
Thirdly, for the questions that can't be answered for the time being, we might as well tell the children that we will discuss them together, with the aim of continuing to cultivate their curiosity and not to dampen their enthusiasm;
Finally, if you show weakness, you might as well ask a question related to your child's question, so that the child can answer or explain it. If the answer is similar, praise it in time and encourage it even if it is not ideal.