Treatment suggestions for a 55-year-old man with a six-year history of methylmalonic acidemia.

A 2-year-and-a-half-old child is suspected of having methylmalonic acidemia, with symptoms including unsteady gait, poor fine motor skills, swallowing and defecation dysfunction, and normal intellectual development.

A child just one month old is required by the disease control center to have a recheck of propionylcarnitine C3, and asks about treatment methods after confirmation.