preferential
/ˌprefəˈrenʃl; ˌprɛfə`rɛnʃəl/ adj
1 of, giving, receiving or showing preference(2) 优先的; 给予优先的; 得到优先的; 优待的
preferential import duties, tariffs, etc, ie favouring a particular group, country, etc 特惠关税（优待某团体、 国家等）.
2 (idm 习语) give sb/get preferential `treatment treat sb/be treated more favourably than sb else 偏向某人[得到优待]
Nobody gets preferential treatment in this office! 本办事处无论对谁均一视同仁!