So I want to solve like strategically in case dealing with acute kidney injury. I want to follow like what all I have to look for in the question stem and laboratory findings to quickly solve acute kidney injury and questions in NBME and USMLE Step 1. Can you please give me a step-by-step approach? Because in AKI, we have all these pre-renal azotemia, intrinsic AKI and post-renal azotemia, where in interrenal I have to think about acute tubular necrosis and acute interstitial nephritis. And in tubular, I have to think about ischemic causes and nephrotoxic causes. And sometimes even in acute interstitial nephritis, we have drugs, right? Like diuretics and all the keys like penicillins, foping, diuretics, and rifampin and everything. So acute interstitial nephritis also has drugs and acute tubular necrosis. Drug related also will come, like how can I differentiate the mode of them and then papillary necrosis and we have post-renal azotemia. And we have, say in the question stem, they are giving like diarrhea, vomiting, and shock, and everything. I can think of alkalemia, markers I have to look in the lab to quickly solve questions. Give me a statistic, singular approach.