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a 14-year-old boy complains of a wet cough with sputum discharge. sick for more than 2 years. during this period, an exacerbation of the process with an increase in body temperature, the appearance of sputum mucosa was noted 5 times. objectively: the skin is pale, clean. above the pulmonary fields, a pulmonary shade of percussion tone is determined, auscultatory against the background of hard breathing, diffuse rales of different sizes are heard on both sides. from other systems, pathological changes were not detected. complete blood count: hb – 120 g/l, er-3.5x1012/l, l-8.4x109/l, p-3%, s-60%, e-1%, l-34%, m-2%, esr-15mm/h. chest x-ray: pulmonary pattern enhancement. the task. 1. please, form the preliminary diagnosis.. 2. create plan of examination of the patient and interpret cbc 3. list main principles of therapy.