Step through the construction below. Each time a new point is inserted, watch the tree decide whether it needs to split a region:
Ultimately, the most rigorous traceability solutions, including QR codes and microchips, won't be useful if people don't actually check them as a condition of making their purchases. Imitators can simply counterfeit QR code labels, for example.
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DownHard thing to leave on a cold dayThe answer is Bed.