e:Р » Proper TCM diagnosis of the zheng of the patientР » Correct selection of the corresponding therapeutic strategies and principles that guide the choice of herbs and herbal formulasР·Digression from either of the above guidence will lead to misuses of herbs, and will result plications in patientР6、Р·Randomized controlled trials Р Advantages:Р» Elimination of the potential bias in the allocation of participants to the intervention group or control group Р» Tendency to parable groupsР» Guaranteed validity of statistical tests of significance РLimitations:Р » Difficulty in generalizing the results obtained from the selected sampling to the population as a wholeР» A poor choice for research where temporal factors are an issue Р» Extremely heavy resources, requiring very large sample groups
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