Surgery - Colorectal. In brief: Yes, most docs can. Most hemorrhoids should first be treated by conservative measures, such as bulking the stools, education to avoid bad habits like straining, sitting for long periods of time, etc.
Either system will have a burner. 23 years may very well be beyond the typical life expectancy of a oil burner, but a furnace or boiler should last considerably longer than 23 years. The boiler of my house here in MA is 58 years old and still works fine. I am starting to consider replacements, however.
Life Expectancy of Furnace. We were told our ten year old American Standard furnace's heat exchanger is bad at our last service call. The company sent us an estimate to replace the whole system to the tune of almost $3,000.00 with a Trane system. After much research it seems to me that a furnace should last longer then ten years. Ours is a natural gas system, and the one that we had replaced was thirteen years old.