全文获取类型
收费全文 | 4392篇 |
免费 | 321篇 |
国内免费 | 66篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 49篇 |
妇产科学 | 83篇 |
基础医学 | 172篇 |
口腔科学 | 386篇 |
临床医学 | 732篇 |
内科学 | 448篇 |
皮肤病学 | 27篇 |
神经病学 | 123篇 |
特种医学 | 66篇 |
外科学 | 599篇 |
综合类 | 528篇 |
预防医学 | 336篇 |
眼科学 | 18篇 |
药学 | 598篇 |
7篇 | |
中国医学 | 528篇 |
肿瘤学 | 72篇 |
出版年
2024年 | 12篇 |
2023年 | 77篇 |
2022年 | 135篇 |
2021年 | 199篇 |
2020年 | 209篇 |
2019年 | 192篇 |
2018年 | 148篇 |
2017年 | 172篇 |
2016年 | 200篇 |
2015年 | 166篇 |
2014年 | 329篇 |
2013年 | 406篇 |
2012年 | 266篇 |
2011年 | 292篇 |
2010年 | 225篇 |
2009年 | 190篇 |
2008年 | 196篇 |
2007年 | 191篇 |
2006年 | 152篇 |
2005年 | 141篇 |
2004年 | 105篇 |
2003年 | 119篇 |
2002年 | 96篇 |
2001年 | 58篇 |
2000年 | 60篇 |
1999年 | 28篇 |
1998年 | 31篇 |
1997年 | 43篇 |
1996年 | 33篇 |
1995年 | 31篇 |
1994年 | 28篇 |
1993年 | 28篇 |
1992年 | 26篇 |
1991年 | 12篇 |
1990年 | 15篇 |
1989年 | 12篇 |
1988年 | 10篇 |
1987年 | 23篇 |
1986年 | 15篇 |
1985年 | 18篇 |
1984年 | 17篇 |
1983年 | 15篇 |
1982年 | 14篇 |
1981年 | 11篇 |
1980年 | 8篇 |
1979年 | 6篇 |
1978年 | 4篇 |
1977年 | 4篇 |
1974年 | 3篇 |
1971年 | 2篇 |
排序方式: 共有4779条查询结果,搜索用时 15 毫秒
1.
2.
3.
目的观察肛窦炎应用针刺配合肠炎散保留灌肠治疗的效果。方法选取2017年10月-2018年10月就诊的72例肛窦炎患者,采用随机数字表法分为观察组(n=36)与对照组(n=36)。对照组给予肠炎散保留灌肠治疗,观察组为针刺配合肠炎散保留灌肠治疗,比较2组症状、疗效及安全性。结果观察组症状(放射痛、指诊症状及镜检症状)少于对照组,总有效率高于对照组,差异有统计学意义(P<0.05);2组安全性相比,差异无统计学意义(P>0.05)。结论针对肛窦炎患者,予以针刺配合肠炎散保留灌肠治疗效果确切,可减少临床症状,加快疾病转归,且治疗安全性较好。 相似文献
4.
Ye Gao Lei Xin Yu-Xin Wang Yuan-Hang Dong Zhuan Liao 《Scandinavian journal of gastroenterology》2020,55(1):105-113
AbstractBackground and aim: Capsule retention is the most common adverse event associated with video capsule endoscopy. The use of double-balloon enteroscopy-assisted capsule endoscope retrieval has been increasingly reported in recent years. However, evidence is limited regarding its success rate, associated factors, and subsequent clinical outcomes.Methods: A systematic review of relevant studies published before January 2019 was performed. Successful retrieval rate and associated factors, rate of endoscopic balloon dilation, and outcomes after double-balloon enteroscopy were summarized and pooled.Results: Within 154 associated original articles, 12 including 150 cases of capsule retrieval by double-balloon enteroscopy were included. The estimated pooled successful retrieval rate was 86.5% (95% confidence interval, 75.6–95.1%). Anterograde approach and capsules retained in the jejunum or trapped by malignant strictures were associated with a higher successful retrieval rate than the retrograde approach (62/83 [74.7%] vs. 10/38 [26.3%], p?<?.001) and capsules retained in the ileum (41/41 [100.0%] vs. 43/58 [74.1%], p?<?.001) or trapped by benign strictures (21/21 [100.0%] vs. 65/83 [78.3%], p?=?.043). Endoscopic balloon dilation was performed in 38.8% (95% confidence interval, 22.3–56.3%) of patients with benign strictures. Two perforations (1.3%) were reported as severe adverse events after double-balloon enteroscopy. A significantly lower surgery rate was found among cases with successful video capsule removal compared with unsuccessful cases (7.2% vs. 38.5%, p?=?.002).Conclusions: Double-balloon enteroscopy is feasible and safe for removing retained video capsule endoscopes, and its use could decrease the need for surgery in patients with benign strictures and facilitate subsequent surgery in patients with malignant strictures. 相似文献
5.
By substituting the saturated vapour phase tension of the pure normal hydrocarbons described by the Clausius-Clapeyron law into the accepted expression of the specific retention volume (Vg,T), a theoretically coherent and relatively simple mathematical evidence of the elution behaviour of the homologous members has been deduced. It gives exponential retention time dependence on carbon number for isothermal, and nearly equidistant (i.e., approximately linear retention-time dependence on carbon number) elution for linear temperature programmed gas chromatographic runs. The final equations are in close correlation with the experimental results. Special emphasis is placed on the fact that a good approximation—not strict physical laws—have been found. 相似文献
6.
Modulating effects of posttraining epinephrine on memory: Involvement of the amygdala noradrenergic system 总被引:5,自引:0,他引:5
These experiments examined the effects, on retention, of posttraining intra-amygdala administration of norepinephrine (NE), and propranolol. Rats were trained on a one-trial step-through inhibitory avoidance task and tested for retention 24 h later. Injections were administered bilaterally (1.0 microliter/injection) through chronically-implanted cannulae. Low doses of NE (0.1 or 0.3 microgram) administered shortly after training enhanced retention while higher doses (1.0 or 5.0 micrograms) were ineffective. Retention was not affected by NE administered 3 h after training. The effect of intra-amygdala NE on retention is blocked by simultaneous administration of propranolol (0.2 microgram). This finding suggests that the memory-enhancing effect of NE may be mediated by beta-receptors. Posttraining intra-amygdala NE also attenuated the retention deficit produced by adrenal demedullation. Further, intra-amygdala injections of propranolol (0.2 microgram) blocked the enhancing effect, on retention, of posttraining s.c. injections of epinephrine. These findings suggest that activation of noradrenergic receptors in the amygdala may be involved in memory processing and may play a role in the memory-modulating effect of peripheral epinephrine. 相似文献
7.
Hidero Minami Ryo Matsutani Atsushi Mizokami Mikio Namiki 《International journal of urology》2007,14(4):368-369
Abstract: A 19-year-old woman presented at our hospital with acute urinary retention in September 2005. She had experienced the same chief complaint twice previously. She had used non-steroidal anti-inflammatory drugs before acute urinary retention. The results of physical examinations were unremarkable, and her neurologic signs were not remarkable. The basic laboratory test values were all normal and a psychiatric assessment indicated that her symptoms were not psychogenic. Magnetic resonance imaging was carried out, but revealed only a slight bulging in the L3/L4/L5 disk. Water cystometry showed acontractile detrusor. We made a diagnosis of acute urinary retention as a result of non-steroidal anti-inflammatory drugs because of her use of such drugs before the development of symptoms on multiple occasions. This patient was regularly followed up as an outpatient, and she could void smoothly in February 2006. This is the first report which acute urinary retention associated with non-steroidal anti-inflammatory drugs in Japan. 相似文献
8.
9.
本文报告乳腺积乳囊肿43例。讨论了发病原因及病理,特别提出局部肿块波动感试验阳性,A超检查显示液平段,试穿抽出乳汁,对诊断有肯定价值;治疗以手术切除为主,仅有7例穿刺抽吸乳汁得以治愈。 相似文献
10.