筛查

筛查	shāi chá	to screen (for disease etc)
筛	shāi	(bound form) a sieve / to sieve; to sift; to filter / to eliminate through selection / to warm a pot of rice wine (over a fire or in hot water) / to pour (wine or tea) / (dialect) to strike (a gong)
查	Zhā	surname Zha
查	chá	to research / to check / to investigate / to examine / to refer to / to look up (e.g. a word in a dictionary)
查	zhā	variant of 楂