1 INTRODUCTION  
2 SAMPLE AND DATA ANALYSIS  
2.1 Sample  
2.2 Spectra Stacking  
2.3 Stellar Population Synthesis  
3 RESULTS AND ANALYSIS  
3.1 Radial Stellar Age  
3.2 Co-added Radial Properties  
3.3 Dependence on the Host Galaxy Morphology  
3.4 [O III] Luminosity of the AGN Sample  
4 DISCUSSION  
4.1 The Selection Effect of the AGN Sample  
4.2 The Hα Equivalent Width of the AGN Sample  
5 SUMMARY