Final answer:
Based on Maria's symptoms, the doctor may order several laboratory tests including a complete blood count (CBC), blood tests to assess liver and kidney function, sputum culture, and chest radiograph.
Step-by-step explanation:
The symptoms described in the question suggest that Maria may be experiencing fatigue, coughing, night sweats, loss of appetite, and a low-grade fever. Based on these symptoms, the doctor may order several laboratory tests to try to diagnose the problem. Some possible tests include a complete blood count (CBC), blood tests to assess liver and kidney function, sputum culture, and chest radiograph.