TOURISTS who visit Bolivia’s capital, La Paz, or Cusco, Peru’s former Inca seat, are routinely given welcome cups of coca tea to mitigate soroche (altitude sickness).

游览玻利维亚首都拉巴斯或秘鲁印加文化遗址库斯科的观光客，通常都会拿到一杯迎宾的古柯叶茶以纾缓高山症（soroche）症状。

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These include chewing the leaves to mitigate the rigours of Bolivia's bleak Altiplano, 4, 000 metres (13, 100 feet) above sea level, as well as the coca tea given to tourists on arrival in La Paz.

ECONOMIST: Bolivia