全文获取类型
收费全文 | 6308篇 |
免费 | 455篇 |
国内免费 | 67篇 |
专业分类
耳鼻咽喉 | 42篇 |
儿科学 | 149篇 |
妇产科学 | 215篇 |
基础医学 | 770篇 |
口腔科学 | 89篇 |
临床医学 | 537篇 |
内科学 | 1686篇 |
皮肤病学 | 130篇 |
神经病学 | 767篇 |
特种医学 | 191篇 |
外科学 | 671篇 |
综合类 | 11篇 |
一般理论 | 3篇 |
预防医学 | 335篇 |
眼科学 | 72篇 |
药学 | 469篇 |
中国医学 | 13篇 |
肿瘤学 | 680篇 |
出版年
2024年 | 19篇 |
2023年 | 147篇 |
2022年 | 299篇 |
2021年 | 474篇 |
2020年 | 277篇 |
2019年 | 299篇 |
2018年 | 350篇 |
2017年 | 221篇 |
2016年 | 269篇 |
2015年 | 298篇 |
2014年 | 311篇 |
2013年 | 363篇 |
2012年 | 503篇 |
2011年 | 463篇 |
2010年 | 240篇 |
2009年 | 191篇 |
2008年 | 303篇 |
2007年 | 333篇 |
2006年 | 283篇 |
2005年 | 263篇 |
2004年 | 229篇 |
2003年 | 209篇 |
2002年 | 175篇 |
2001年 | 36篇 |
2000年 | 24篇 |
1999年 | 35篇 |
1998年 | 31篇 |
1997年 | 17篇 |
1996年 | 22篇 |
1995年 | 19篇 |
1994年 | 18篇 |
1993年 | 17篇 |
1992年 | 9篇 |
1991年 | 14篇 |
1990年 | 10篇 |
1989年 | 8篇 |
1988年 | 9篇 |
1987年 | 5篇 |
1986年 | 4篇 |
1984年 | 4篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 4篇 |
1979年 | 4篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1972年 | 2篇 |
排序方式: 共有6830条查询结果,搜索用时 0 毫秒
81.
82.
Giorgina Barbara Piccoli Gianfranca Cabiddu Rossella Attini Federica Neve Vigotti Stefania Maxia Nicola Lepori Milena Tuveri Marco Massidda Cecilia Marchi Silvia Mura Alessandra Coscia Marilisa Biolcati Pietro Gaglioti Michele Nichelatti Luciana Pibiri Giuseppe Chessa Antonello Pani Tullia Todros 《Journal of the American Society of Nephrology : JASN》2015,26(8):2011-2022
CKD is increasingly prevalent in pregnancy. In the Torino-Cagliari Observational Study (TOCOS), we assessed whether the risk for adverse pregnancy outcomes is associated with CKD by comparing pregnancy outcomes of 504 pregnancies in women with CKD to outcomes of 836 low-risk pregnancies in women without CKD. The presence of hypertension, proteinuria (>1 g/d), systemic disease, and CKD stage (at referral) were assessed at baseline. The following outcomes were studied: cesarean section, preterm delivery, and early preterm delivery; small for gestational age (SGA); need for neonatal intensive care unit (NICU); new onset of hypertension; new onset/doubling of proteinuria; CKD stage shift; “general” combined outcome (preterm delivery, NICU, SGA); and “severe” combined outcome (early preterm delivery, NICU, SGA). The risk for adverse outcomes increased across stages (for stage 1 versus stages 4–5: “general” combined outcome, 34.1% versus 90.0%; “severe” combined outcome, 21.4% versus 80.0%; P<0.001). In women with stage 1 CKD, preterm delivery was associated with baseline hypertension (odds ratio [OR], 3.42; 95% confidence interval [95% CI], 1.87 to 6.21), systemic disease (OR, 3.13; 95% CI, 1.51 to 6.50), and proteinuria (OR, 3.69; 95% CI, 1.63 to 8.36). However, stage 1 CKD remained associated with adverse pregnancy outcomes (general combined outcome) in women without baseline hypertension, proteinuria, or systemic disease (OR, 1.88; 95% CI, 1.27 to 2.79). The risk of intrauterine death did not differ between patients and controls. Findings from this prospective study suggest a “baseline risk” for adverse pregnancy-related outcomes linked to CKD. 相似文献
83.
Federico Coccolini Cristian Tranà Massimo Sartelli Fausto Catena Salomone Di Saverio Roberto Manfredi Giulia Montori Marco Ceresoli Chiara Falcone Luca Ansaloni 《World journal of gastrointestinal surgery》2015,7(8):160-169
AIM: To investigate the role of laparoscopy in diagnosis and treatment of intra abdominal infections.METHODS: A systematic review of the literature was performed including studies where intra abdominal infections were treated laparoscopically.RESULTS: Early laparoscopic approaches have become the standard surgical technique for treating acute cholecystitis. The laparoscopic appendectomy has been demonstrated to be superior to open surgery in acute appendicitis. In the event of diverticulitis, laparoscopic resections have proven to be safe and effective procedures for experienced laparoscopic surgeons and may be performed without adversely affecting morbidity and mortality rates. However laparoscopic resection has not been accepted by the medical community as the primary treatment of choice. In high-risk patients, laparoscopic approach may be used for exploration or peritoneal lavage and drainage. The successful laparoscopic repair of perforated peptic ulcers for experienced surgeons, is demonstrated to be safe and effective. Regarding small bowel perforations, comparative studies contrasting open and laparoscopic surgeries have not yet been conducted. Successful laparoscopic resections addressing iatrogenic colonic perforation have been reported despite a lack of literature-based evidence supporting such procedures. In post-operative infections, laparoscopic approaches may be useful in preventing diagnostic delay and controlling the source.CONCLUSION: Laparoscopy has a good diagnostic accuracy and enables to better identify the causative pathology; laparoscopy may be recommended for the treatment of many intra-abdominal infections. 相似文献
84.
Manuel Zorzi Nicola Gennaro Giulia Capodaglio Emanuele Damiano Luca Urso Salvatore Pucciarelli Laura Memo Eva Carpin Mariachiara Corti Massimo Rugge Ugo Fedeli 《Digestive and liver disease》2019,51(2):304-309
Background
Growing evidence suggests that colorectal cancer (CRC) screening based on the fecal immunochemical test (FIT) reduces CRC incidence and surgical resection rates.Aims
To compare trends in surgery for proximal and distal CRC among Italian regions at different stages of screening implementation.Methods
From the National Hospital Discharge Database we selected hospitalizations with CRC resection of residents aged 50–74 years during 2002–2014, and computed surgery rates for the 8 most populous Italian regions with/without a screening program.Results
In regions with screening, implemented around 2006–2007, the annual percent change (APC) of distal CRC resection was +1.7 (95% confidence interval ?1.0, 4.4) during 2002–2007 and ?9.1 (?10.6, ?7.7) during 2007–2014. No significant change was observed in regions without screening. The APC for proximal colon resection in regions with screening was +5.8 (2.5, 9.0) during 2002–2007 and ?4.1 (?5.8, ?2.4) during 2007–2014, while in regions without screening surgical rates increased through the whole study period. Compared to 2002, in 2014 distal CRC resection rates were greatly reduced in regions with screening, reaching values similar to proximal CRC resection.Conclusion
Following the implementation of screening programs surgery rates steeply decreased, confirming the deep impact of FIT-based screening on the burden of CRC. 相似文献85.
86.
87.
88.
89.
Giuseppe Stabile Antoine Lepillier Ermenegildo De Ruvo Marco Scaglione Matteo Anselmino Frederic Sebag Domenico Pecora Mark Gallagher Mariano Rillo Graziana Viola Luca Rossi Valerio De Santis Maurizio Landolina Antonello Castro Massimo Grimaldi Nicolas Badenco Maurizio Del Greco Antonio De Simone Ennio Pisan Salim Abbey Filippo Lamberti Antonio Pani Giulio Zucchelli Giuseppe Sgarito Daniela Dugo Emanuele Bertaglia Teresa Strisciuglio Francesco Solimene 《Journal of cardiovascular electrophysiology》2020,31(7):1694-1701