Question
A 5-year-old boy has been suffering from a persistent cough and frequent colds. Despite various checks and medications, the cause has not been identified. The parents are worried that the child might be deficient in vitamins or trace elements. However, the child has a scientific diet and feeding habits, and they are unsure how to confirm this.
Answer
The child may be deficient in vitamins or trace elements, but further testing is required to confirm this. Currently, blood routine tests can only determine anemia, but not which trace elements are lacking. It is recommended to take the child to the hospital for relevant tests to detect and treat nutritional deficiencies early on.