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.
Geography refers to the layout physically of the land in an area.  The geography of ancient China was similar to most other geography,  including the river valley civilizati â¦ ons, in that it dealt with the  changing of the seasons, river travel, mountains, valleys, and  desert areas.3 people found this useful.our river valley civilizations are:   1) Egyptian (Nile River) civilization    2) Tigris-Euphrates civilization    3) Huang He (Yellow River) civilization  â¦   4) Indus civilization. + 157 others found this useful.