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.
How long does a propane grill tank last? The lifetime of a propane grill tank can vary. A 20lb cylinder can last indefinitely, as long as it is kept in good condition. The federal government requires that a new cylinder be inspected after 12 years of service, and every 5 years thereafter.