It can be a challenge to distinguish allergic symptoms from dry eye symptoms. Treating a patient who presents with concurrent allergy and dry eye symptoms, however, can be an even greater challenge.
User: how did chinas physical geography affect the development of its early civilizationWeegy: Chinas physical geography affected the development of its early civilization, because they were not close to any other countires, so they did not know to trade with other countries or did not know any other cultures.
China developed independently because of the mountains, deserts and distance from the rest of the world, as well as the diversity in China. Copper resources low, tree supply unlimited, geographic isolation, a great ocean, huge deserts, and high mountains. A system of writing developed by the ancient Chinese.