[2025-09-30T01:24:44.793451] [QUERYOME] Starting research for query 383: 'Instructions: 
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer. 

Question:
Which of the following is used by RBCs in the fasting state? 

Options:
{'A': 'Glucose', 'B': 'Alanine', 'C': 'Ketone body', 'D': 'Fatty acid'}'
[2025-09-30T01:24:44.867055] [PI] Starting research for query: 'Instructions: 
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer. 

Question:
Which of the following is used by RBCs in the fasting state? 

Options:
{'A': 'Glucose', 'B': 'Alanine', 'C': 'Ketone body', 'D': 'Fatty acid'}'
[2025-09-30T01:24:44.868641] Saving text to bench_final/run1/medmcqa/medmcqa_382/pi_initial_prompt.txt
[2025-09-30T01:24:44.873097] [PI] Calling o3 for initial analysis...
[2025-09-30T01:24:52.814904] [PI] Reasoning iteration 1
[2025-09-30T01:24:52.816415] [PI reasoning] **Determining RBC Substrates**

I’m looking to answer which substrate RBCs use in a fasting state. Since RBCs lack mitochondria, they rely solely on anaerobic glycolysis and can only use glucose, regardless of whether they're fed or fasting. They can't use ketone bodies, fatty acids, or alanine, so the clear answer is glucose. I should provide a simple citation, possibly from "Jandl 1987," and note that RBCs exclusively use glucose and produce lactate during this process. I'll look for supporting citations on RBC metabolism.
[2025-09-30T01:24:52.818009] [PI] Executing function call 1: hybrid_search
[2025-09-30T01:24:52.819519] [PI] Function arguments: {'query': 'red blood cells rely exclusively on glucose for energy and do not utilize fatty acids or ketone bodies', 'k': 5, 'faiss_weight': 0.6, 'bm25_weight': 0.4, 'use_rrf': True}
[2025-09-30T01:24:52.820797] Saving JSON to bench_final/run1/medmcqa/medmcqa_382/pi_iteration_1_tool_call_2_hybrid_search.json
[2025-09-30T01:25:58.543393] [PI] Function hybrid_search executed successfully
[2025-09-30T01:25:58.545123] Saving JSON to bench_final/run1/medmcqa/medmcqa_382/pi_iteration_1_tool_result_2_hybrid_search.json
[2025-09-30T01:25:58.549919] [PI] Continuing reasoning with 1 function responses...
[2025-09-30T01:26:02.046141] [PI] Reasoning iteration 2
[2025-09-30T01:26:02.051765] [PI] No function calls found in response
[2025-09-30T01:26:02.055523] [PI] No more function calls - research complete
[2025-09-30T01:26:02.056978] Saving text to bench_final/run1/medmcqa/medmcqa_382/pi_final_answer.txt
[2025-09-30T01:26:02.066022] [QUERYOME] Query completed successfully
