Definitions of treatment:

• noun:   care by procedures or applications that are intended to relieve illness or injury
• noun:   the management of someone or something

  Example: "The treatment of water sewage"

• noun:   a manner of dealing with something artistically

  Example: "His treatment of space borrows from Italian architecture"

• noun:   an extended communication (often interactive) dealing with some particular topic

  Example: "His treatment of the race question is badly biased"