At a family gathering, if you want to politely reduce the conversation with the nanny, you can try the following methods: 1. **Adjust the topic of communication**: During the conversation, guide the topic to areas that you are familiar with, such as talking about the recent situation of family members, the arrangements for the gathering, etc. This can appropriately reduce the communication with the nanny personally. 2. **Provide busy hints**: Show a busy state at the party, such as helping to entertain guests, preparing food, etc., so as to reduce the interaction with the nanny. 3. **Introduce other people**: You can take the initiative to lead the topic to other family members and let everyone participate. In this way, you can reduce direct communication with the nanny by shifting your attention to others. 4. **Use non-verbal communication**: At the party, you can maintain politeness through non-verbal communication such as smiling and nodding, but reduce verbal interaction. 5. **Set occasion boundaries**: You can communicate with your family in advance and explain that you hope to maintain a certain social distance at the party, so that everyone can reach a consensus and avoid embarrassing situations. It is important to maintain respect and politeness, but also consider the overall atmosphere of the party.