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.
Dynastic leaders consolidating territory and developing China's economy exploited the country's natural resources in ways that contributed to famines and natural disasters, writes CFR's Elizabeth Economy in The River Runs Black: The Environmental Challenge to China's Future.