全文获取类型
收费全文 | 27329篇 |
免费 | 2788篇 |
国内免费 | 2065篇 |
专业分类
耳鼻咽喉 | 166篇 |
儿科学 | 210篇 |
妇产科学 | 246篇 |
基础医学 | 3219篇 |
口腔科学 | 420篇 |
临床医学 | 3776篇 |
内科学 | 3852篇 |
皮肤病学 | 251篇 |
神经病学 | 1470篇 |
特种医学 | 1247篇 |
外国民族医学 | 18篇 |
外科学 | 2880篇 |
综合类 | 4895篇 |
现状与发展 | 12篇 |
一般理论 | 4篇 |
预防医学 | 1918篇 |
眼科学 | 687篇 |
药学 | 2883篇 |
36篇 | |
中国医学 | 1736篇 |
肿瘤学 | 2256篇 |
出版年
2024年 | 114篇 |
2023年 | 513篇 |
2022年 | 1368篇 |
2021年 | 1693篇 |
2020年 | 1282篇 |
2019年 | 1118篇 |
2018年 | 1079篇 |
2017年 | 987篇 |
2016年 | 929篇 |
2015年 | 1289篇 |
2014年 | 1684篇 |
2013年 | 1478篇 |
2012年 | 2118篇 |
2011年 | 2250篇 |
2010年 | 1394篇 |
2009年 | 1091篇 |
2008年 | 1321篇 |
2007年 | 1324篇 |
2006年 | 1282篇 |
2005年 | 1222篇 |
2004年 | 797篇 |
2003年 | 846篇 |
2002年 | 770篇 |
2001年 | 618篇 |
2000年 | 619篇 |
1999年 | 601篇 |
1998年 | 385篇 |
1997年 | 388篇 |
1996年 | 256篇 |
1995年 | 263篇 |
1994年 | 229篇 |
1993年 | 151篇 |
1992年 | 150篇 |
1991年 | 148篇 |
1990年 | 82篇 |
1989年 | 73篇 |
1988年 | 84篇 |
1987年 | 63篇 |
1986年 | 35篇 |
1985年 | 24篇 |
1984年 | 22篇 |
1983年 | 12篇 |
1982年 | 4篇 |
1981年 | 9篇 |
1980年 | 2篇 |
1979年 | 7篇 |
1978年 | 3篇 |
1972年 | 2篇 |
1970年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
目的:研究益肾蠲痹法治疗系统性红斑狼疮的疗效.方法:本研究应用"益肾蠲痹法"对54例曾用激素或免疫抑制剂治疗系统性红斑狼疮,因副作用而改用益肾蠲痹法治疗3年以上的患者,观察治疗前后临床疗效、症状积分、激素剂量、血沉、C反应蛋白、ENA系列等指标变化.结果:54例系统性红斑狼疮患者治疗后的症状积分显著下降,ESR、CRP明显下降;激素用量逐渐撤减至停服,ENA系列指标阴转率最高达96.3%.结论:益肾蠲痹法对难治性系统性红斑狼疮,具有疗效高、毒副作用小、症状及实验室指标改善明显等理想疗效,是一种易于推广使用、具有良好产业化前景的治疗方法. 相似文献
72.
73.
目的 研究传统综合训练与智能化多维视觉训练治疗屈光不正性儿童弱视的疗效差异以及相关影响因素。方法 选取2010年7月至2012年9月在我院眼科治疗的弱视儿童患者200例,根据治疗方法的不同分为观察组(智能化多维视觉训练组,100例)和对照组(传统综合训练治疗组,100例),分别给予智能化多维视觉训练和传统综合训练治疗,比较两组患儿的疗效及相关影响因素。结果 观察组治愈70例,进步27例,无效3例;对照组治愈35例,进步45例,无效20例;观察组患儿的疗效显著优于对照组,差异有显著统计学意义(χ2=28.73,P<0.01)。在远视患儿中,观察组的疗效显著优于对照组,差异有显著统计学意义(χ2=11.43,P<0.01),而2组近视和散光患儿疗效差异均无统计学意义(χ2=0.159、0.583,均为P>0.05)。在3-6岁(χ2=10.30,P<0.01)、>6-9岁(χ2=6.665,P=0.036)两个年龄段,观察组患儿的疗效优于对照组,而2组>9-15岁患儿疗效差异并无统计学意义(χ2=1.895,P>0.05)。在不同治疗时间内,观察组患儿治愈率显著高于对照组,差异有显著统计学意义(χ2=20.14,P<0.01)。结论 智能化多维训练相对于传统综合疗法,治疗屈光不正性弱视患儿疗效更佳,且患儿屈光不正类型、发病年龄及治疗时间明显影响疗效。 相似文献
74.
75.
76.
Jie Tian Xiao-Long Wang Long-Cheng Wang Fei Chen Yun Tian Li Ma Chao-Yun Pan Yan-Ping Wang 《Pharmaceutical biology》2022,60(1):1331
ContextQiangli Wuhu (QLWH) mixture is a concoction approved and registered by Ningxia Medical Products Administration. It has therapeutic effects on various types of pneumonia.ObjectiveTo clarify the mechanisms of QLWH in treating pneumonia.Materials and methodsThe potential targets of QLWH in the treatment of pneumonia were predicted by network pharmacology. Male, Institute of Cancer Research (ICR) mice were randomly divided into five groups of 12 mice, control, vehicle, QLWH (10 and 20 mg/kg) and dexamethasone (DXM), and orally treated twice daily with normal saline, QLWH or DXM. The pneumonia model was established by tracheal instillation of lipopolysaccharide (LPS). After treatment five days, ELISA, H&E staining and Western blot were used to investigate protective effects of QLWH.ResultsNine hundred and ninety-four active ingredients were found through network pharmacology, corresponding to 135 targets for the treatment of pneumonia; compared to the vehicle group, QLWH (10 and 20 mg/kg) significantly decreased the levels of TNF-α (14.3% and 28.8%), IL-1β (23.9% and 42.8%) and IL-6 (13.2% and 16.1%), increased the levels of IL-10 (134.3% and 172.9%); in terms of mechanism, QLWH down-regulated TLR4/NF-κB/NLRP3 axis related proteins in lung tissue of pneumonia model mice (p < 0.05).Discussion and conclusionsThis study combined network pharmacology and animal experiments, providing effective evidence for the clinical promotion of QLWH. Meanwhile, it is of significance for further development. 相似文献
77.
The crystallization and viscosity of modified blast furnace slag are key factors in fiber forming conditions. In this paper, the crystallization behavior of modified blast furnace slag under continuous cooling conditions was studied by differential scanning calorimetry, and its crystallization kinetics with different acidity coefficients were established. On this basis, the evolution law of the crystallization phase and the influence of crystallization on the viscosity of modified blast furnace slag with different acidity coefficients were analyzed. The results indicated that the crystallization phases of slag with acidity coefficients of 1.05 and 1.20 were, respectively, Melilite and Anorthite. During the cooling process at the acidity coefficient of 1.05, the critical rates of precipitation of Melilite and Anorthite were 50 °C/s and 20 °C/s, respectively, while they were 20 °C/s and 15 °C/s, respectively, at the acidity coefficient of 1.20. With the increase of the acidity coefficient, the crystal growth mode of slag changed from two-dimensional and three-dimensional mixed crystallization to surface nucleation and one-dimensional crystallization. The crystallization activation energy of slag with acidity coefficients of 1.05 and 1.20 were 698.14 kJ/mol and 1292.50 kJ/mol, respectively. In addition, the change trend of viscosity was related to crystal size and content. 相似文献
78.
Phosphors-in-glass (PiGs) regarded as a promising phosphor-converter for white light emitting diodes (WLEDs) is being researched widely. However, there are few reports on the effect of changing the shape of PiGs on the color rendering index (CRI) and heat dissipation of WLEDs. In this paper, gel casting with Isobam was first attempted in preparing special-shaped PiGs successfully. It exhibited that 76 wt.% was the optimum solid content based on the rheological properties of slurry and the shrinkage of green bodies. The sintering rate should be kept at a low speed and glass transition temperature (Tg) of glass powders must be higher than sublimation temperatures (Ts) of APS and Isobam. The CRI of PiGs was increased by about 27% after changing the shape of PiGs from cylinder to dome. Most importantly, operating temperature also reduced effectively the increase of the surface area of PiGs. Therefore, changing the shape of PiGs by gel casting with Isobam is a creative way for high-power WLEDs lighting. 相似文献
79.
目的 检测MicroRNA-939(miR-939)和性别决定区相关HMG族盒蛋白4(Sry-related HMG box 4,SOX4)在先天性巨结肠(Hirschsprung's disease,HSCR)中的表达水平,评估miR-939在SOX4调控肠神经嵴前体细胞(enteric neural crest c... 相似文献
80.
The impact of serum prealbumin in patients with esophageal carcinoma after undergoing esophagectomy remains unclear, we speculated that serum prealbumin is associated with anastomotic leak (AL) after surgery, low serum prealbumin level may lead to AL. The aim of the study was to evaluate the relationship between serum prealbumin levels and AL after esophagectomy, to explore the value of serum prealbumin as an early predictor of AL after esophagectomy.Between January 2014 and December 2018, 255 patients were enrolled in this study, their basic characteristics and perioperative serum prealbumin levels were retrospectively analyzed. Statistical analysis by t test, nonparametric test and logistic regression were used to analyze data for patients with and without AL. Based on a receiver operator characteristic curve, a cut-off value for serum prealbumin levels as a predictor of AL was determined.Among the 255 patients, 18 patients were diagnosed with AL. The overall AL rate was 7.0% (18/255) including 12 cases of intrathoracic AL and 6 cases of cervical AL. By univariate analysis, we identified postoperative serum prealbumin level as a risk factor for AL (P < .001). Multivariate analysis also demonstrated postoperative serum prealbumin level (P = .028) to be an independent risk factor for AL. The best cut-off value of postoperative serum prealbumin level was 131 mg/L for predicting AL, with 83.3% sensitivity and 72.2% specificity.Postoperative serum prealbumin level was significantly associated with AL. it may help the early prediction of postoperative AL. 相似文献