下边是我建立的一个gam模型，用gam.check函数输出的结果，这个怎么看我建立gam模型的好坏啊~
麻烦各位大佬帮忙解答一下吧~拜托拜托~


Method: UBRE   Optimizer: outer newton
full convergence after 7 iterations.
Gradient range [-4.185978e-10,3.36819e-08]
(score 1.439144 & scale 1).
Hessian positive definite, eigenvalue range [0.0007922882,0.004474436].
Model rank =  49 / 49

Basis dimension (k) checking results. Low p-value (k-index<1) may
indicate that k is too low, especially if edf is close to k'.

                k'  edf k-index p-value   
s(Day)        7.00 7.00    0.70  <2e-16 ***
s(humid_lag0) 3.00 2.82    1.08    0.91   
s(PM25_lag0)  6.00 4.05    0.97    0.26   
s(PM10_lag0)  9.00 8.44    1.11    0.97   
s(SO2_lag0)   6.00 4.72    0.94    0.17   
s(NO2_lag0)   8.00 7.85    1.05    0.81   
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1