首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   84308篇
  免费   6714篇
  国内免费   1718篇
耳鼻咽喉   723篇
儿科学   1932篇
妇产科学   1096篇
基础医学   3452篇
口腔科学   4500篇
临床医学   7893篇
内科学   10141篇
皮肤病学   1518篇
神经病学   5161篇
特种医学   2064篇
外国民族医学   21篇
外科学   8712篇
综合类   14925篇
现状与发展   8篇
一般理论   4篇
预防医学   6011篇
眼科学   1497篇
药学   8207篇
  157篇
中国医学   8877篇
肿瘤学   5841篇
  2024年   314篇
  2023年   1401篇
  2022年   2509篇
  2021年   3441篇
  2020年   3718篇
  2019年   2833篇
  2018年   2652篇
  2017年   2941篇
  2016年   3218篇
  2015年   2960篇
  2014年   5793篇
  2013年   7937篇
  2012年   5671篇
  2011年   5970篇
  2010年   5027篇
  2009年   4338篇
  2008年   3809篇
  2007年   4043篇
  2006年   3613篇
  2005年   3075篇
  2004年   2576篇
  2003年   2247篇
  2002年   1873篇
  2001年   1518篇
  2000年   1294篇
  1999年   1014篇
  1998年   831篇
  1997年   761篇
  1996年   634篇
  1995年   560篇
  1994年   519篇
  1993年   448篇
  1992年   366篇
  1991年   329篇
  1990年   240篇
  1989年   249篇
  1988年   225篇
  1987年   213篇
  1986年   194篇
  1985年   243篇
  1984年   193篇
  1983年   131篇
  1982年   171篇
  1981年   135篇
  1980年   121篇
  1979年   111篇
  1978年   62篇
  1977年   58篇
  1976年   46篇
  1975年   28篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
肿胀法超声抽吸术治疗腋臭83例疗效观察   总被引:1,自引:0,他引:1  
目的观察肿胀法超声抽吸术治疗液臭的效果,寻找一种治疗腋臭的新方法。方法在腋窝毛发区皮下注入肿胀液80~100ml,经5mm大小切口将超声探头在腋部皮下组织快速移动,直到皮肤发红发热为止,再用负压抽吸被乳化的皮下组织加压包扎。结果83例受术者,术后6~12个月随访,效果良好者76例(91.5%),有效5例(6.25%),无效2例(2.25%)。结论肿胀法超声抽吸术治疗腋臭,操作简单,不留瘢痕,安全有效,是目前治疗腋臭较为理想的方法。  相似文献   
12.
机械通气治疗小儿急性肺损伤   总被引:1,自引:0,他引:1  
目的:探讨小儿急性肺损伤(ALI)的临床治疗。方法:对本院综合ICU1998年4月至2002年4月发生的22例小儿ALI的临床治疗情况进行回顾性分析。结果:本组22例小儿ALI采用呼吸末正压机械通气(PEEP)联合大剂量甲基强的松龙冲击治疗,有效率为86.36%;3例死亡,死亡率为13.64%,死于多器官功能不全综合征(MODS)。结论:机械通气治疗小儿ALI应选择最佳PEEP,动态监测动脉血气指标和X线胸片,在综合治疗基础上加用大剂量甲基强的松龙冲击治疗能收到较好的疗效。  相似文献   
13.
1例射频消融术后并发肺栓塞的抢救配合及护理   总被引:2,自引:0,他引:2  
总结1例射频消融术后并发肺栓塞的抢救配合及护理体会,认为肺栓塞患者一旦发生晕厥,应立即行心肺复苏,以确保有效的循环和呼吸,尽早溶栓,改善临床症状。积极的抢救、熟练的配合、良好的护理是此患者康复的关键,同时术后早期生命体征的监测、并发症的预防、合理饮食、适当活动及休息对预防肺栓塞的发生也是很重要的。  相似文献   
14.
目的:窦道是通达组织深部的盲管性创道,时发时愈,迁延日久.是临床工作者常见的问题,治疗十分困难;为探索窦道的新的治疗途径,开展了微波治疗窦道的临床研究.方法:微波组:采用微波热机局部照射 外科常规换药治疗;根据病变部位分别选择直径为10cm或16cm的辐射器,辐射器距窦道口距离为3cm~5cm,隔1d或隔2d治疗1次,每次30 min,10次为1个疗程,微波治疗功率为70W,治疗结束观察治疗效果.对照组:按外科常规换药治疗.结果:微波组痊愈率98%,好转率2%,总有效率100%;对照组痊愈率37.5%,有效率37.5%,无效率25%,总有效率75%;结论:微波治疗窦道不愈患者具有简单、安全、方便、疗效独特等优点.  相似文献   
15.
BACKGROUND: Dermatofibrosarcoma protuberans (DFSP) is a rare malignant tumour of the skin, with an estimated incidence of 0.8 to five cases per 1 million people per year. OBJECTIVE: To study epidemiological, immunohistochemical and clinical features, delay in diagnosis, type of treatment and outcome of DFSP from 1982 to 2002. METHODS: Using data from the population-based cancer registry, 66 patients with pathologically proved DFSP were included (fibrosarcomatous DFSP were excluded). Each patient lived in one of the four departments of Franche-Comté (overall population of 1 million people) at the time of diagnosis. The main data sources came from public and private pathology laboratories and medical records. The rules of the International Agency for Research on Cancer were applied. RESULTS: The estimated incidence of DFSP in Franche-Comté was about three new cases per 1 million people per year. Male patients were affected 1.2 times as often as female patients were. The trunk (45%) followed by the proximal extremities (38%) were the most frequent locations. DFSP occurred mainly in young adults between 20 and 39 years of age. Mean age at diagnosis was 43 years, and the mean delay in diagnosis was 10.08 years. Our 66 patients initially underwent a radical local excision. Among them, 27% experienced one or more local recurrences during 9.6 years of follow-up. There was one regional lymph node recurrence without visceral metastases. These recurrences were significantly related to the initial peripheral resection margins. We observed a local recurrence rate of 47% for margins less than 3 cm, vs. only 7% for margins ranging from 3 to 5 cm [P=0.004; OR=0.229 (95%, CI=0.103-0.510)]. The mean time to a first local recurrence was 2.65 years. Nevertheless, there was no death due to the DFSP course at the end of the follow-up, and the final outcome was favourable. CONCLUSION: Our study emphasizes the importance of wide local excision with margins of at least 3 cm in order to prevent local recurrence. However, the recent development of inhibitors of signal transduction by the PDGFB pathway should soon modify the surgical strategy, which is often too mutilating.  相似文献   
16.
The results of lumbar fusion in chronic low back pain (LBP) patients vary considerably, and there is a need for proper patient selection. Lumbosacral orthoses have been widely used to predict outcome, however, with little scientific support. The aim of the present study was to determine the value of a pantaloon cast test in selecting chronic LBP patients for lumbar fusion or conservative management. First, a systematic review of the literature was carried out in which two independent reviewers identified studies in Medline, Cochrane and Current Contents databases. Three papers met the selection criteria. In the only study with a control group, a significantly better outcome after fusion compared to conservative treatment was found in patients who reported significant pain relief while in a cast (i.e. a positive cast test). The results of lumbar fusion, however, were not significantly different for patients with a positive and those with a negative cast test. In addition to the review, a clinical cohort study of 257 LBP patients, who had been allocated to either lumbar fusion or conservative management by a temporary external transpedicular fixation trial, was performed. Prior to allocation, all had undergone a pantaloon cast test. Patients with no history of prior spine surgery and with a positive pantaloon cast test had a better outcome after lumbar fusion than those treated conservatively (P = 0.002, χ 2 test). In patients with previous spine operations the outcomes were poor and the test was of no value. From the literature and the present patient cohort, it was concluded that only in chronic LBP patients without prior spine surgery, a pantaloon cast test with substantial pain relief suggests a favorable outcome of lumbar fusion compared to conservative management. The test has no value in patients who have had previous spine surgery.  相似文献   
17.
AIM: To evaluate the outcome of primary vesicoureteral reflux (VUR) using conservative treatment. METHODS: Eighty-seven children with primary VUR who had been treated with a conservative medical regimen and monitored through a yearly cystogram were recruited for the study. The study was conducted at the Pediatric Nephrology Clinic in Songklanagarind Hospital, the major tertiary care center in southern Thailand. Statistical analyses using Kaplan-Meier survival curves, chi-squared test, Fisher's exact test and multivariate analysis with Cox regression were performed. RESULTS: The study group consisted of 41 boys and 46 girls, with a total of 133 VUR. The age of the boys was significantly lower than that of the girls (P < 0.001). Resolution of the low grades (grades I-III) of VUR was significantly more frequent than that of the high grades (grades IV-V) (68/95, 72%vs 14/38, 37%; P < 0.001). Using the Kaplan-Meier survival analysis and log-rank test, the resolutions of VUR in boys versus girls, and age <1 years versus >or=1 years were not significantly different (P = 0.2252 and 0.4756, respectively). Low-grade VUR and unilateral VUR had significantly higher probabilities of resolution than high-grade VUR and bilateral VUR, respectively (P = 0.0041 and 0.0467, respectively). Multivariate Cox regression analysis indicated that among low-grade VUR, boys and unilateral VUR had significantly higher probabilities of resolution. Among the high-grade VUR, neither sex nor laterality had a significant effect on the probabilities of VUR resolution. CONCLUSION: This study offers more evidence that children with low-grade VUR have a higher chance of reflux resolution if they are boys and have only unilateral VUR. There is still no good guide for resolution of reflux in children with high-grade VUR.  相似文献   
18.
Consecutive patients (n = 215) who were referred to optometric (55%) or multidisciplinary (45%) low-vision services and above 50 years of age were recruited from four hospitals in the Netherlands. They completed two vision-related quality of life questionnaires, the Vision Quality of Life Core Measure (VCM1) and the Low Vision Quality of Life Questionnaire (LVQOL), before their first visit with low-vision services and 1 year later. At follow-up, patients referred to multidisciplinary low-vision services had lower scores on the mobility subscale of the LVQOL than patients referred to optometric low-vision services [5.3 points; 95% confidence interval (CI): 0.2-10.5]. Paired sample t-tests for the two groups of patients taken together show improvement for the VCM1 (3.1 points; 95% CI: 0.6-5.6) and deterioration for the basic aspects of vision (3.5 points; 95% CI: 1.1-5.9) and the mobility (6.6 points; 95% CI: 3.7-9.5) subscales of the LVQOL. In conclusion, people referred to optometric services showed less deterioration in mobility than those referred to multidisciplinary services. No differences were observed for any of the other subscales of the LVQOL and the VCM1. Future research in this field should include randomized controlled designs comparing low-vision services with no treatment or placebo.  相似文献   
19.
目的 探讨数字减影血管造影(DSA)诊断与介入治疗在胃肠道动脉性出血中的应用价值.方法 回顾性总结78例消化道动脉性出血患者的DSA表现和动脉栓塞、药物灌注的治疗经验.结果 本组患者十二指肠溃疡15例,胃溃疡5例,胃癌2例,Dieulafoy病1例,血管畸形和发育不良9例,胃肠术后吻合口出血8例,肝胆疾患术后肝动脉破裂出血10例,Crohn病5例、肠道憩室出血6例、小肠炎或溃疡6例,小肠息肉3例,小肠中度恶性间质瘤1例,小肠高分化平滑肌肉瘤2例,直结肠癌5例.74%(58/78)的患者DSA造影阳性,造影剂外溢直接征象者33%(26/78),术后吻合口出血直接征象者83%(15/18).介入治疗的病例中动脉药物灌注15例,技术成功率60%(9/15),临床成功率40%(6/15);栓塞36例,技术成功率86%(31/36),临床成功率72%(26/36);介人治疗后再出血率16%(8/51),其中1例栓塞后再呕血经胃镜治疗无效死亡.DSA造影和介入治疗后手术者27例,造影与术后病理诊断的符合率为78%(21/27).随访时间2个月至3年,未发生胃肠道缺血坏死等并发症.结论 DSA对消化道动脉性出血的定位、定性有着重要价值,选择性动脉栓塞及药物灌注止血安全有效,有助于择期手术和并发症处理.  相似文献   
20.
减少急诊医疗纠纷实行全程无缝隙优质服务   总被引:1,自引:0,他引:1  
目的防范医疗纠纷,提供“全程无缝隙优质服务”,以提高急诊护理急救服务质量。方法对急诊33 700例急症病人采用热情接诊、主动护送(护送病人检查和转入病区)、细心观察、真实记录、送走道别等服务措施。结果共紧急护送急症患者33 700例(100%);在护送过程中发生病情变化者117例(0.35%),经急救处理全部脱险;医疗纠纷发生率为0。结论采用“全程无缝隙优质服务”,可减少急诊科医疗纠纷的发生,提高医疗质量。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号