Mr. Smith is a 72-year-old widower. He is generally in good health, but his eyesight is declining from complications related to adult-onset diabetes. His primary care doctor has recommended that he have a screening colonoscopy that requires sedation. Because of the sedation requirement, Mr. Smith will need someone to drive him home form the appointment and stay with him until he is fully recovered. Mr. Smith does not have any friends of neighbors willing to do this and his children live out of state. What are some challenges people face in this stage of life that make preventative health-care practices more difficult? Would you also be concerned about the effects of social isolation on Mr. Smith? Why or why not?