According to the situation you described, swallows have no vitality and always close their eyes and don't eat, which may be caused by many reasons, such as fatigue, infection, hunger and dehydration. Since there is no veterinarian near you, you can try the following measures:
1. Provide enough food and water: Swallows need enough food and water to keep their strength. If you feed it some beef, that's good, but please make sure to provide clean water and proper food. Try using insects, flies or other small invertebrates as food, but don't give them too much meat.
2. Provide a warm and comfortable place: Swallows need to rest in a quiet, warm and comfortable place. You can build a temporary shelter for it indoors or outdoors to avoid the wind, rain and sun. You can build a simple nest with simple materials such as towels and cartons to make swallows feel safe.
3. Observe its health: If the swallow's body temperature is still low, or its begging persists, it may need further medical help. I suggest you contact your local wildlife rescue center or veterinarian for advice and professional treatment advice.
4. Pay attention to health and epidemic prevention: Pay attention to health and epidemic prevention when handling swallows. If there are wounds or other potential health problems, appropriate disinfection and treatment are needed. In addition, please don't touch swallows directly, and use gloves or tools to reduce your risk.
If the swallow's condition has not improved, or you are worried about the swallow's health, you should contact the local wildlife rescue center or veterinarian as soon as possible, and they can provide more professional advice and treatment.
I hope this information can help you, and I wish you and Swallow all the best.