The 81-year-old-man, cough and shortness of breath for 2 days. ABG: PH: 7.395, BE: 8.0, PaO2:23.9, PCO2: 58.6; WBC: 9900/cumm and CRP: 95.6 mg%.
根據以上影像,您的臆測診斷是什麼?