猫鼬中的"$ in"有什么问题

{
  "_id": 1,
  "name": "Alice",
  "age": 25
}
{
  "_id": 2,
  "name": "Bob",
  "age": 30
}
{
  "_id": 3,
  "name": "Charlie",
  "age": 35
}

const ages = [25, 26, 27, 28, 29, 30];
const users = await User.find({ age: { $in: ages } });

{
  "_id": 1,
  "name": "Alice",
  "age": 25
}
{
  "_id": 2,
  "name": "Bob",
  "age": 30
}