In recent years， the exploration and development of artificial intelligence （AI） technology in clinical trials for liver diseases have promoted the continuous innovation of research methods and processes in this field. AI has gradually become an important technical tool for various links of clinical trial including patient selection， risk stratification， endpoint evaluation， and result interpretation. Nevertheless， the standardized integration of AI into clinical trials still faces the methodological challenges such as data quality control， model interpretability， and causal inference. From the perspective of methodology， this article systematically reviews the principal application scenarios of AI as an object under investigation （validation trials） and as a research tool （supportive trials） in clinical trials for liver diseases， as well as the major methodological challenges of AI-related clinical trials along and the corresponding solution strategies， in order to provide methodological guidance for promoting the scientific and standardized implementation of AI technologies.

Objective:To observe the clinical efficacy of the rehabilitation technique of "regulating abdomen and dredging collaterals" in the treatment of children with global developmental delay (GDD), and to provide clinical experience and basis for promoting the rehabilitation treatment of GDD.Methods:Eighty-two children with GDD were selected and divided equally into the control and the treatment group according to the random number table method. The control group received conventional rehabilitation treatment, and the treatment group received "regulating abdomen and dredging collaterals" rehabilitation treatment on the basis of the conventional rehabilitation treatment. The duration of treatment for both groups was 5 times a week for 3 months. The developmental quotient (DQ) of the children in both groups was recorded using the Geselll Developmental Scale as an assessment tool to observe the scores of the five functional areas, i.e. gross motor, fine motor, language, adaptive, and personal-social.Results:At the end of the treatment, the DQ values of the children in both groups improved significantly in each energy area (all P<0.05). The treatment group outperformed the control group in terms of total effective rate and gross motor, language, and adaptability (all P<0.05), while the differences between the two groups in fine motor and personal-social energy areas were not statistically significant (all P>0.05). Conclusions:The "regulating abdomen and dredging collaterals" rehabilitation technique is clinically effective in the treatment of GDD, with significant improvement in gross motor, language, and adaptive energy areas.

Children have unique physiological and pathological characteristics, and their various system diseases are closely related to immune function, such as respiratory system, digestive system, nervous system, endocrine system, etc. These correlations are directly or indirectly related to the intestinal micro-ecosystem. In recent years, more and more study results show that as a major component of the human micro-ecosystem, the intestinal micro-ecosystem plays a decisive role in the important physiological functions of children such as immunity, metabolism, nutrition, etc. Children's intestinal micro-ecosystem is also associated with the treatment and prognosis of infectious diseases, chronic intestinal inflammatory diseases, allergic diseases, autoimmune diseases and metabolic diseases. In this paper, the related research of intestinal micro-ecology and some common diseases in pediatrics were summarized and discussed, the correlation between intestinal micro-ecology and pediatric diseases were deeply analyzed, in order to further understand the potential pathogenesis of pediatric diseases, and to provide new ideas for guiding the clinical treatment and long-term rehabilitation.