交通区位是区域的空间可达性的重要标志，强化了人口的沿河道分布并加大了区段间的差异。
Traffic location is an important symbol of spatial accessibility, and it strengthened the characteristics of along the watercourse and sectionality.
结果发现，成绩差异量越大，可达性越低；无论个体进行上行比较还是下行比较，当成绩差异量为20%时，其行为水平显著高于其他成绩差异量时的行为水平。
When the difference of the achievement was 20%, the participants would get the high levels of the behavior both in the upward social comparison and downward social comparison.
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