Alpesh Paleja, chief economist at CBI, said: "although sales have grown in the past few months, the basic trading conditions for retailers remain difficult. We expect that the pressures on households to actually pay will continue for a while, so retailers still face challenges. " The response to variability is a resilient instinct. Elastic instinct (also called the conditioned reflex) is an organism formed in the process of life change with conditions and reflection, under certain conditions unrelated stimulus be signals caused by reflections of the unconditioned stimulus. It is not innate, but the reflection of the organism under certain conditions under certain conditions. Conditioned reflex can make animal learning and memory and non-conditional reflex related, but completely different new reflection activity. The formation of conditioned reflex is the formation or connection of the cerebral cortex, which is based on non-conditioned reflex. With conditioned reflex, animals not only reflect things that have direct physiological meaning, but also those that have indirect physiological significance. Elastic instinct can make animals for the changed things to adjust their instinctive behavior, make it easy to adapt to changes in the environment, thus than rigid instinct has more flexibility and purpose, and the body through the conditioning can not before the arrival of the stimulus itself accordingly reaction, make the body more proactive and initiative. Anyway, elastic instinct is higher biological value of variability of external things more advanced way of ordering reaction, is on the rigid instinct, extension, and the synthesis, make rigid instinct has more purposeful and flexibility It can be seen that shares and shares are the relationship between form and content and cannot be confused. Gasoline sales in the United States are mainly due to competitive gasoline prices and rising fuel efficiency, with a high seasonal impact. Population and cultural factors are also important factors that influence the trend of gasoline consumption in the United States, according to Jill Mislinski, an analyst with Advisor Perspectives. Attract capital and people Interest rates in different countries have different connotations. In China, interest rates typically refer to bank interest rates, further pointing to the pboc's benchmark deposit and lending rates. In the United States, mainly refers to the bond market interest rates, the fed adjustment of benchmark interest rate, also not have mandatory administrative benchmark interest rates, but through open market operations after determine its rate for overnight loans between Banks.