目的   初步探讨可注射型载阿霉素水凝胶对胶质瘤的治疗作用。方法   使用透析法检测载阿霉素水凝胶在体外释放药物的情况。构建大鼠皮下C6胶质瘤模型，按不同给药途径分为空白对照组、经静脉注射组、水凝胶组。给药15 h后，经免疫荧光检测阿霉素在肿瘤内部的分布情况。给药7 d后，计算出各组的抑瘤率；并对肿瘤组织进行苏木精-伊红染色。结果   在体外，载阿霉素水凝胶具有缓释药物的性能。在体内，与经静脉给药相比，局部注射载阿霉素水凝胶使瘤内分布更多阿霉素，抑瘤率更高（42% vs 64%），肿瘤细胞坏死更明显。结论   载阿霉素水凝胶可为胶质瘤局部化学治提供新的载体。

      Objective  To investigate the therapeutic effect of injectable doxorubicin-containing hydrogel on glioma．Methods  The release of doxorubicin hydrogel in vitro was detected by dialysis．The subcutaneous C6 glioma model of  rats was constructed and divided into blank control group，intravenous injection group and hydrogel group according to different administration methods．The distribution of doxorubicin in the tumor was detected by immunofluorescence 15 hours after administration．After 7 days of administration，the tumor inhibition rate of each group was calculated．The tumor tissue was stained with hematoxylin eosin．Results  In vitro，doxorubicin-containing hydrogels had sustained drug release properties．In vivo，compared with intravenous administration，local injection of doxorubicin-containing hydrogel resulted in more doxorubicin distribution，higher tumor inhibition rate（42% vs 64%）and more obvious tumor cell necrosis．Conclusions  Doxorubicin-containing hydrogel can provide a new carrier 

for local chemotherapy of glioma．

    目的   研究羽毛球颠球运动对低年级小学生近视的改善效果，为制定儿童青少年近视干预方案提供依据。方法   采用方便抽样方法，抽取广州市1个城区1所小学三年级4个班共182名学生作为研究对象。基线调查完成后，以班为单位，采用随机数字表法将4个班分为干预组（2个班，91例）和对照组（2个班，91例），干预组安排羽毛球颠球项目体育活动，对照组按原教学计划安排非球类常规体育活动。比较两组干预前后筛查性近视率、视力不良率和近视进展程度。结果  干预前两组的年龄、性别、筛查性近视率、视力不良率及近视分级比较，差异均无统计学意义（P＞0.05）。两组干预后的等效球镜度数（SE）比较，差异无统计学意义（P＞0.05）；对照组干预后的裸眼远视力（UDVA）低于干预组，△UDVA、△SE均高于干预组，差异均有统计学意义（P＜0.05）。对照组新发筛查性近视率29.13%、累积筛查性近视率49.45%、累积视力不良率68.13%及近视进展程度，均高于干预组新发筛查性近视率7.69%、累积筛查性近视率34.07%、累积视力不良率52.74%及近视进展程度，差异均有统计学意义（P＜0.05）。结论   羽毛球颠球运动能降低低年级小学生视力不良进展速度，减少近视的发生率及近视程度，学校可结合引起近视的因素进行灵活应用，以预防近视的发生发展。

      Objective  To study the impact of badminton juggling on the myopia of lower-grade primary school students and to provide a basis for developing myopia intervention strategies for children and adolescents．Methods  By using the convenience sampling method，182 third-grade students from four classes in a primary school in a district of Guangzhou were selected as subjects．After completing the baseline survey，the four classes were divided into an intervention group（2 classes，91 students）and a control group（2 classes，91 students）using a random number table．The intervention group was arranged to participate in badminton juggling sports activities，while the control group followed the original teaching plan without ball games．The study compared the screening rate of myopia，the rate of poor vision，and the degree of myopia progression before and after the study in both groups．Results  On baseline，there were no statistically significant differences between the two groups in terms of age，gender，rate of screening myopia，poor vision，and myopia grading（P＞0.05）．After 12 months，there was no statistically significant difference in the spherical equivalent（SE） comparison between the two groups（P＞0.05）．However，the uncorrected distance visual acuity（UDVA） of the control group after 12 months was significantly lower than that of the intervention group，and both △UDVA and △SE were significantly higher than those of the intervention group，with all differences being statistically significant（P＜0.05）．Incidence of screening myopia in the control group （29.13%），the cumulative rate of screening myopia（49.45%），the cumulative rate of poor vision （68.13%），and the degree of myopia progression was significantly higher than those in the intervention group，which had incidence of screening myopia at 7.69%，the cumulative rate of screening myopia at 34.07%，cumulative rate of poor vision at 52.74%．All these differences were statistically significant（P＜0.05）．Conclusions  Badminton juggling can slow down vision deterioration，reduce the incidence and severity of myopia in lower grade primary school students．Schools can flexibly apply these findings in conjunction with factors that contribute to myopia to prevent its occurrence and development．