Spatial Query API - How to detect if a player is in a part?

How would I use the new spatial query API to add health to a players humanoid?

local Part = --PathToYourPart
local Players = game:GetService("Players")

local parts = workspace:GetPartBoundsInBox(Part.CFrame, Part.Size)

for i , part in pairs(parts) do
   local model = part:FindFirstAncestorOfClass("Model")
   local player = Players:GetPlayerFromCharacter(model)

   if model and player then
      --get player's character and add health to humanoid
   end
end