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.
About most countries you can say that they are developing and developed, there is no absolute answer, only a point somewhere on a scale. China was the world's greatest economy long before Europe had got out of bed and possibly may develop into such again. Many cities are more developed than many cities in the West, but there are still millions of peoople living in poor circumstances in the countryside. China is thus a country of great contrasts.