Put a basin in the box to increase the humidity. If it can't be reached in the north, 50% will be fine. Don't neglect ventilation because of humidity.

Picky food is related to poor conditions, so you should take care of it slowly.

Eyes may be inflamed or infected by bacteria. Try chloramphenicol eye drops, 2-3 times a day.

For the symptoms of cold and respiratory infection, you can take an amoxicillin capsule+100 ml warm water bath once a day. Or take 0.05g of medicinal powder in the capsule and feed it to tomatoes.

Adding an appropriate amount of electrolytic multivitamin to drinking water for a week will help to restore the state.