It is the passion, rather than material reward请问老师reward后要不要加复数？

【答】用单数或者复数都可以。例如：物质鼓励和精神鼓励相结合  combine material reward with moral encouragement（摘自《最新词汇汉英翻译词典》p.313）material goods / possessions / rewards / wealth 物质产品 / 财产 /奖励 /财富（摘自《韦氏高阶英汉双解词典》material  adj.）