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.
This article is a travel topic. China's system of political geography differs somewhat from that in other countries. Most of it is broken up into provinces (ç), but there are several other geographic units of the same hierarchical rank as provinces: Various ethnic groups have autonomous regions (èªæ²»åº), although their autonomy is far from complete.