Objectif Diplomatie: Livre De L'eleve. Levels A1-A2 (+ Audio CD)

The spies were fighting a nineteenth-century war. The analysts belonged to our age, and the lesson of their triumph is that the complex, uncertain issues that the modern world throws at us require the mystery paradigm. Diagnosing prostate cancer used to be a puzzle, for example: the doctor would do a rectal exam and feel for a lumpy tumor on the surface of the patientБЂ™s prostate. These days, though, we donБЂ™t wait for patients to develop the symptoms of prostate cancer. Doctors now regularly test middle-aged men for elevated levels of PSA, a substance associated with prostate changes, and, if the results look problematic, they use ultrasound imaging to take a picture of the prostate. Then they perform a biopsy, removing tiny slices of the gland and examining the extracted tissue under a microscope. Much of that flood of information, however, is inconclusive: elevated levels of PSA donБЂ™t always mean that you have cancer, and normal levels of PSA donБЂ™t always mean that you donБЂ™t БЂ“ and, in any case, thereБЂ™s debate about what constitutes a normal PSA level ...»