**Table 6:** Close companions of RQQs and RLQs^a.
Sample	$N_{\rm ave}$	$N_{\rm ave}$	$N_{\rm c}/N_{\rm tot}$	$N_{\rm c}/N_{\rm tot}$
	(50 kpc)	(100 kpc)	(50 kpc)	(100 kpc)
RQQ	0.27 $\pm$ 0.59	0.93 $\pm$ 1.03	20%	60%
(this work)
FSRQ	0.19 $\pm$ 0.39	1.19 $\pm$ 1.01	19%	75%
(K98)
SSRQ	0.05 $\pm$ 0.22	0.53 $\pm$ 0.68	5%	42%
(K00)

^a Column (1) gives the sample; (2) the average number of companions within 50 kpc radius; (3) the average number of companions within 100 kpc radius; (4) and (5) the fraction of quasars with close companion within 50 kpc and 100 kpc radius, respectively.

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