Salesforce custom setting

可以用来存储一些每段时间都需要进行维护的数值

查询方法和 查询对象类似

Account_Segmentation_Threshold__c AccountSegmentationThreshold = [
				select Follower_Threshold__c, Innovator_Threshold__c, Leader_Threshold__c, Survivor_Threshold__c
				from Account_Segmentation_Threshold__c
		];