摘要
A freezing wind sweeps through the narrow Tibetan valley,whistling over the sand,stones and dry grass,buffeting the grazing sheep and the low houses of the tiny village which nestles there at an altitude of 4,600 meters.High overhead white clouds scud across skies of an unimaginably intense cobalt blue.Towards the south,the glistening peak of Everest rises momentarily from amidst the bank of clouds which hover over the barren ochre slopes already in autumnal garb and heralding the onset of winter.The farmers have been busy gathering