GSAS精修成这样，结下来还要修哪些参数？

继续修了一下，有些峰的强度还是差的比较多，我把我修的结果发上来，麻烦精修的高手帮忙看一下。
下面是精修后的结果：
Powder data statistics Fitted -Bknd Average
Bank Ndata Sum(w*d**2) wRp Rp wRp Rp DWd Integral
Hstgm 1 PXC 1 3650 45286. 0.1094 0.0792 0.1418 0.1020 0.280 0.893
Powder totals 3650 45286. 0.1094 0.0792 0.1418 0.1020 0.280

No serial correlation in fit at 90% confidence for 1.910 < DWd < 2.090
Cycle 159 There were 3650 observations.
Total before-cycle CHI**2 (offset/sig) = 4.5286E+04 ( 4.8928E+02)
Reduced CHI**2 = 12.49 for 25 variables

Reflection data statistics
Histogram 1 Type PXC Nobs = 558 R(F**2) = 0.0906
同时还想问一下wRp Rp前后两个有什么区别？ 后面的DWd Integral代表什么意思？CHI**2通常到多少认为比较合适？